Finding the Fourth Proportional to 72.24, 108.12 and 63.70
Calculator
Solution
The fourth proportional to 72.24, 108.12 and 63.70 is: 95.34
Step by Step Solution
- Step 1: Write the proportion equation
72.24 : 108.12 = 63.70 : x - Step 2: Convert to fraction form
72.24/108.12 = 63.70/x - Step 3: Cross multiply
72.24x = 108.12 × 63.70 - Step 4: Simplify right side
72.24x = 6,887.24 - Step 5: Solve for x
x = 6,887.24/72.24 - Step 6: Final answer
x = 95.34
Related Problems
Find fourth proportional to 36.12, 54.06 and 31.85
Half scale
Find fourth proportional to 144.48, 216.24 and 127.40
Double scale
Find fourth proportional to 73.24, 109.62 and 64.70
Similar ratio
Find fourth proportional to 108.36, 162.18 and 95.55
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.