What is the third proportional to 12 and 54?
- A182
- B4.5
- C243
- D42
Solution & Step-by-step Explanation
If c is the third proportional to two numbers a and b, then the relation is given by:
b
a
=
c
b
⟹c=
a
b
2
Here, a=12 and b=54:
c=
12
54×54
c=
2
54×9
=27×9=243
b
a
=
c
b
⟹c=
a
b
2
Here, a=12 and b=54:
c=
12
54×54
c=
2
54×9
=27×9=243