Question 38
On the blackboard there was a quadrilateral $ABCD$ in which the points $P$, $Q$, $R$, $S$ were marked on the sides $AB$, $BC$, $CD$, $DA$, respectively, such that
$$
\frac{AP}{PB} = \frac{BQ}{QC} = \frac{CR}{RD} = \frac{DS}{SA} = \frac{1}{2}.
$$
The entire figure was deleted except the four points $P$, $Q$, $R$, $S$.
Describe a procedure that allows the quadrilateral $ABCD$ to be reconstructed.
$$
\frac{AP}{PB} = \frac{BQ}{QC} = \frac{CR}{RD} = \frac{DS}{SA} = \frac{1}{2}.
$$
The entire figure was deleted except the four points $P$, $Q$, $R$, $S$.
Describe a procedure that allows the quadrilateral $ABCD$ to be reconstructed.