Answer :
To answer the question above, it should be noted that the ratio of the consumer price indices (CPI) is equal to the ratio of the prices. For this given, let x be the price of the house in 1980,
130.7 / 82.4 = $98700 / x
The value of x is equal to $62,225.55
130.7 / 82.4 = $98700 / x
The value of x is equal to $62,225.55