my car gets 18 miles/ gallon if driving 194 miles, how many gallons of gas will i need 18 miles is to 1 gallon as 194 is to ? gallons. 18 miles 194 miles —————————— = ——————————— 1 gallon x gallons 18 194 ———— = —————— 1 x 18x = 194 x =x = gallons Edwin