Earnings of American Broadcasting Co., Inc., rose more than 32 per cent in the third quarter to $22.7 million (95 cents) in the 1976 period. Revenues rose to $357 million from $21.3 million, the company said yesterday.

Profits of the New York Times Co. increased 36 per cent in the third quarter, as advertising carried in the firm's New York daily newspaper climbed 12 per cent over the same period last year, the communications company reported yesterday.

Times Mirror Co., of LOs Angeles, reported a 44 per cent rise in profits for the recent quarters. The West Coast firm owns the Los Angeles Times. Newsday on long Island and the Dallas Times Herald.

ABC's earnings for the nine months jumped to $73 million ($4.13) on sales of $1.1 billion compared with $47.4 million ($269) on revenues period $951 million for the same period a year ago.

New York Times Co. profits in the third quater totaled $5.8 million (51 cents a share) in the 1976 period as revenues rose 16 per cent to $124 million.

Nine month earnings rose to $18.1 million $1.53 on revenues of $368.5 million compared with profits a year earlier of $13.1 million ($1.16) on revenues of $322 million.

Weekly circulation of The Times newspaper averaged 503,000 in the third quarter, a gain of 6,600 from last year. Sunday circulation picked up 7,900 to an average of 1.4 million.

Times Morror Co. earned $25.6 (76 cents a share) in the recent quarter compared with $17.7 million (52 cents) a year earlier. Revenues rose to $278 million from $241 million.

For the first nine months, the diversified publishing and forest products company earned $69.7 million ($2.06 a share) compared with $49 million ($1.45) in the 1976 period. Revenues totaled $824.4 million vs. $714.7 million.

A company statement attributed the increases primarily to newspaper publishing, with substantial advertising and circulation revenue gains at the Los Angeles Times, Company officers forecast a record year.

Media General, a communications firm based in Richmond in that city, reported third quarter profits declined to $4.05 million (54 cents a share) from $4.08 million (56 cents) last year as revenues rose to $54 million from $51 million.

President Alan S. Donnahoe said newsprint division earnings were down for the period.