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Finding the Fourth Proportional to 87,454.70, 130,890.45 and 76,957.10

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Solution

The fourth proportional to 87,454.70, 130,890.45 and 76,957.10 is: 115,179.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,454.70 : 130,890.45 = 76,957.10 : x
  2. Step 2: Convert to fraction form
    87,454.70/130,890.45 = 76,957.10/x
  3. Step 3: Cross multiply
    87,454.70x = 130,890.45 × 76,957.10
  4. Step 4: Simplify right side
    87,454.70x = 10,072,949,449.70
  5. Step 5: Solve for x
    x = 10,072,949,449.70/87,454.70
  6. Step 6: Final answer
    x = 115,179.05

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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.