Margie's car can go 3232 miles on a gallon of gas, and gas currently costs $4$4 per gallon. how many miles can margie drive on $20$20 worth of gas?

Given:
32 miles on a gallon of gas
$4 per gallon.

Ratio of miles to cost of gallon.

32 : 4

Out of the $20 worth of gas, there is 5 gallons.

$20 / $4 = 5 gallons.

Proportion:

32 : 1 = x : 5

32*5 = 1x
160 = 1x

Margie can drive 160 miles on 5 gallons gas worth $20.