In a rhombus, diagonals are perpendicular bisectors of each other. They also bisect the interior angles.<br><br>
Given \( \angle RPS = 86 \times \angle PTS \). In rhombus QRST, \( \angle PTS \) and \( \angle RPS \) are related through the diagonal intersection at P.<br><br>
Using angle properties of the rhombus, \( \angle QPR = 86^\circ \).<br><br>
Final Answer: 86&deg;