Finding the Fourth Proportional to 87.24, 130.87 and 25.55
Calculator
Solution
The fourth proportional to 87.24, 130.87 and 25.55 is: 38.33
Step by Step Solution
- Step 1: Write the proportion equation
87.24 : 130.87 = 25.55 : x - Step 2: Convert to fraction form
87.24/130.87 = 25.55/x - Step 3: Cross multiply
87.24x = 130.87 × 25.55 - Step 4: Simplify right side
87.24x = 3,343.73 - Step 5: Solve for x
x = 3,343.73/87.24 - Step 6: Final answer
x = 38.33
Related Problems
Find fourth proportional to 43.62, 65.44 and 12.78
Half scale
Find fourth proportional to 174.48, 261.74 and 51.10
Double scale
Find fourth proportional to 88.24, 132.37 and 26.55
Similar ratio
Find fourth proportional to 130.86, 196.31 and 38.33
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.