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Finding the Fourth Proportional to 87,681, 131,540.98 and 40,908.36

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Solution

The fourth proportional to 87,681, 131,540.98 and 40,908.36 is: 61,371.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,681 : 131,540.98 = 40,908.36 : x
  2. Step 2: Convert to fraction form
    87,681/131,540.98 = 40,908.36/x
  3. Step 3: Cross multiply
    87,681x = 131,540.98 × 40,908.36
  4. Step 4: Simplify right side
    87,681x = 5,381,125,764.59
  5. Step 5: Solve for x
    x = 5,381,125,764.59/87,681
  6. Step 6: Final answer
    x = 61,371.63

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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.