161051, 102487, 65219, 41503, continue the sequence plz ?

161051, 102487, 65219, 41503, continue the sequence plz ?

This is a geometric sequence with ratio 

$$\small{\text{$r
= \dfrac{102487}{161051}
= \dfrac{65219}{102487}
= \dfrac{41503}{65219}
= \dfrac{63}{99}
$}}$$

$$t_5=t_4\cdot r=41503 \cdot r=26411$$