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    Subject

    Quantitative Aptitude

    Topic

    Ratio

    What is the value of x, if it is 2% of the fourth proportional to 6, 7 and 36?

    ক)
    0.23
    খ)
    0.42
    গ)
    0.84
    ঘ)
    0.92
    ঙ)
    0.99

    Explanation

    Let the fourth proportional to 6, 7 and 36 be a ⇒67=36a⇒a=7×366⇒a=42⇒x=2100×42=84100=0.84\begin{array}{l} \Rightarrow \frac{6}{7} = \frac{{36}}{a}\\ \Rightarrow a = \frac{{7 \times 36}}{6}\\ \Rightarrow a = 42\\ \Rightarrow x = \frac{2}{{100}} \times 42 = \frac{{84}}{{100}} = 0.84 \end{array} Hence, x = 0.84

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