Find the third proportional to 10 and 30? Select the correct option:
A) 10	B) 60	C) 80	D) 90	E) 20
Formula = Third proportional = (b × b)/a   A = 10 and B = 30   (30 x 30)/ 10 = 900/10= 
<gadget id="calculator">900/10</gadget>
<output>90</output>
90   90
<result>D</result>
Find the third proportional to 10 and 30?