If a boat uses 17 gallons of gas to go 66 miles, how many miles can the boat travel on 51 gallons of gas?

Question

Please show work.

Answer 1

16 gal / 66 mi = 51 gal / x miles ⇐ you set up a proportion!

 

Can you solve this for x?

 

Hint: you can 'cross' multiply and then ...

Answer 2

17 : 66 :: 51 : x         proportion given

17x = 3366               product of means/extremes

x = 198                     divide both sides by 17