Finding the Fourth Proportional to 138,421.20, 207,493.56 and 68,350.80
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Solution
The fourth proportional to 138,421.20, 207,493.56 and 68,350.80 is: 102,457.94
Step by Step Solution
- Step 1: Write the proportion equation
138,421.20 : 207,493.56 = 68,350.80 : x - Step 2: Convert to fraction form
138,421.20/207,493.56 = 68,350.80/x - Step 3: Cross multiply
138,421.20x = 207,493.56 × 68,350.80 - Step 4: Simplify right side
138,421.20x = 14,182,350,820.85 - Step 5: Solve for x
x = 14,182,350,820.85/138,421.20 - Step 6: Final answer
x = 102,457.94
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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.