The school held a rope skipping competition. There were 34 participants in the third grade, 1.5 times the number of participants in the fourth grade, and 36 fewer participants in the fifth grade than the total number of participants in the third and fourth grades. How many people in 5th grade attend?
学校举行跳绳比赛，三年级有34人参加，四年级参加的人数是三年级的1.5倍，五年级参加的人数比三、四年级参加的总人数少36人．五年级有多少人参加？
<gadget id="calculator">34 * 1.5</gadget>
<output>51</output>

<gadget id="calculator">34 - 36</gadget>
<output>-2</output>

<gadget id="calculator">51 + (-2)</gadget>
<output>49</output>

<result>49</result>