Hi there!
1 meter is equal to 39.3701 inches
In order to find you answer, you'll need to use the cross product method:
1 meter = 39.3701 inches
x = 54 inches
(1 × 54) ÷ 39.3701 = x
54 ÷ 39.3701 = x
1.37159926 = x
1.37 ≈ x
Your answer is : If someone is 54 inches, they are about 1.37 meters tall.
There you go! I really hope this helped, if there's anything just let me know! :)