China Mathematical Competition (Shaanxi)

Suppose points $F_1$, $F_2$ are the foci of the ellipse $\frac{x^2}{9}+\frac{y^2}{4}=1$, $P$ is a point on the ellipse, and $|P{F}_1|:|P{F}_2|=2:1$. Then the area of $△P{F}_1{F}_2$ is equal to ________.