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Finding the Fourth Proportional to 87,689.75, 131,554.08 and 40,917.11

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Solution

The fourth proportional to 87,689.75, 131,554.08 and 40,917.11 is: 61,384.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,689.75 : 131,554.08 = 40,917.11 : x
  2. Step 2: Convert to fraction form
    87,689.75/131,554.08 = 40,917.11/x
  3. Step 3: Cross multiply
    87,689.75x = 131,554.08 × 40,917.11
  4. Step 4: Simplify right side
    87,689.75x = 5,382,812,104.54
  5. Step 5: Solve for x
    x = 5,382,812,104.54/87,689.75
  6. Step 6: Final answer
    x = 61,384.74

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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.