Finding the Fourth Proportional to 138,625.20, 207,937.80 and 76,417.20
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Solution
The fourth proportional to 138,625.20, 207,937.80 and 76,417.20 is: 114,625.80
Step by Step Solution
- Step 1: Write the proportion equation
138,625.20 : 207,937.80 = 76,417.20 : x - Step 2: Convert to fraction form
138,625.20/207,937.80 = 76,417.20/x - Step 3: Cross multiply
138,625.20x = 207,937.80 × 76,417.20 - Step 4: Simplify right side
138,625.20x = 15,890,024,450.16 - Step 5: Solve for x
x = 15,890,024,450.16/138,625.20 - Step 6: Final answer
x = 114,625.80
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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.