Finding the Fourth Proportional to 66.87, 92.39 and 60.80
Calculator
Solution
The fourth proportional to 66.87, 92.39 and 60.80 is: 83.99
Step by Step Solution
- Step 1: Write the proportion equation
66.87 : 92.39 = 60.80 : x - Step 2: Convert to fraction form
66.87/92.39 = 60.80/x - Step 3: Cross multiply
66.87x = 92.39 × 60.80 - Step 4: Simplify right side
66.87x = 5,616.55 - Step 5: Solve for x
x = 5,616.55/66.87 - Step 6: Final answer
x = 83.99
Related Problems
Find fourth proportional to 33.44, 46.19 and 30.40
Half scale
Find fourth proportional to 133.74, 184.77 and 121.59
Double scale
Find fourth proportional to 67.87, 93.77 and 61.80
Similar ratio
Find fourth proportional to 100.31, 138.58 and 91.19
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.