Answer
The required equation is $x=k\frac{yz}{\sqrt{w}}$ and value of $y$ is $\frac{x\sqrt{w}}{kz}$.
Work Step by Step
As the value of $x$ varies jointly as $y$ and $z$ and inversely as $\ \sqrt{w}$ , we have
$x=k\frac{yz}{\sqrt{w}}$
Where $k$ is a constant
Now, solve the above equation for $y$.
Divide $x=k\frac{yz}{\sqrt{w}}$ by $\frac{\sqrt{w}}{kz}$ , and we have
$y=\frac{x\sqrt{w}}{kz}$
