60 girls represent 4 parts, so one part of students is 60 / 4 = <<60/4=15>>15 students.
There are 15 * 3 = <<15*3=45>>45 boys at the dance.
The teachers at the dance are 45 * 0,2 = 9 teachers at the dance.
There are 60 + 45 + 9 = <<60+45+9=114>>114 people at the dance.
#### 114