Find the fourth proportional to 0.2,0.12 and 0.3?  Answers:
A) 0.18
B) 0.21
C) 0.22
D) 0.34
E) 0.45
Formula = Fourth propotional = (b × c)/a   0.18 = 0.2 , B = 0.12 and C = 0.3   (0.12 × 0.3)/0.2   0.036/0.2= 
<gadget id="calculator">0.036/0.2</gadget>
<output>0.18</output>
0.18   0.18
<result>A</result>
Find the fourth proportional to 0.2,0.12 and 0.3?