RCA Corp. reported yesterday that third quarter net income rose to $62.9 million (82 cents a share) from $33.4 million (43 cents) a year ago.

Revenue was $1.46 billion compared with $1.33 billion in 1976.

For the nine months, RCA's net income totaled $181.5 million ($2.37) against $121.4 million ($1.57) last year.

Edgar H. Griffiths, RCA president and chief executive officer, said, "These results reflect gains in RCA's traditional electronics sector as well as its diversified businesses. They place us on target in building the record year we have been projecting for 1977."

RCA is the parent of the National Broadcasting Co. radio and television network and Hertz rental car corporation. It also manufactures television sets and other consumer electronic products.

International Paper Co. reported third quarter earnings of $62.1 million ($1.33) yesterday, up 5.6 per cent from $58.8 million ($1.29) a year before.

Sales totaled $924 million, up 4.5 per cent from $884 million a year earlier.

J. Sanford Smith, chief executive officer, said the firm's business "remained at high levels of activity in some areas, but others were adversely affected by the slowing in the rate of economic growth in the U.S. and the continued low level of economic activity outside of the U.S."

Whirlpool Corp. yesterday reported it earned $83.7 million ($1.85) from the same period last year. Sales were 22 per cent above the $1.2 billion for the corresponding 1976 period.

The improvement reflected continuing strong demand for major home appliances, said John Platts, Whirlpool chairman.

Hiltan Hotels reported record third quarter profits of $9.4 million (66 cents a share), compared with $7.7 milliono (54 cents) reported in the same period a year ago.

The company said the healthy performance resulted despite a 16 per cent decline in its Las Vegas operations due a reduction in group and convention business.

Revenue for the quarter totaled $90.2 million against $87.8 million reported a year ago.

Nine month results showed profits of $28.4 million ($1.98) on revenue of $274.6 million compared to $22.3 million ($1.57) on revenue of $258.6 million.