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Finding the Fourth Proportional to 87,137.92, 130,706.88 and 40,384.64

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Solution

The fourth proportional to 87,137.92, 130,706.88 and 40,384.64 is: 60,576.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,137.92 : 130,706.88 = 40,384.64 : x
  2. Step 2: Convert to fraction form
    87,137.92/130,706.88 = 40,384.64/x
  3. Step 3: Cross multiply
    87,137.92x = 130,706.88 × 40,384.64
  4. Step 4: Simplify right side
    87,137.92x = 5,278,550,294.32
  5. Step 5: Solve for x
    x = 5,278,550,294.32/87,137.92
  6. Step 6: Final answer
    x = 60,576.96

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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.