The young pioneers went to the nursing home to serve grandpa and grandma. Originally, the ratio of outdoor workers to indoor workers was 5:3. Later, 18 people were transferred from outside to support indoors. At this time, the indoor workers accounted for 60% of the total. How many young pioneers participated in the service activities?
少先队员到敬老院为爷爷、奶奶服务．原来室外劳动人数与室内人数的比是5：3，后来从室外抽调18人支援室内，这时室内人数占总人数的60%，一共有多少名少先队员参加服务话动？
<result>72</result>