Finding the Fourth Proportional to 129,520.22, 178,747.05 and 72,163.31
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Solution
The fourth proportional to 129,520.22, 178,747.05 and 72,163.31 is: 99,590.46
Step by Step Solution
- Step 1: Write the proportion equation
129,520.22 : 178,747.05 = 72,163.31 : x - Step 2: Convert to fraction form
129,520.22/178,747.05 = 72,163.31/x - Step 3: Cross multiply
129,520.22x = 178,747.05 × 72,163.31 - Step 4: Simplify right side
129,520.22x = 12,898,977,526.18 - Step 5: Solve for x
x = 12,898,977,526.18/129,520.22 - Step 6: Final answer
x = 99,590.46
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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.