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Finding the Fourth Proportional to 87,252.60, 130,878.90 and 81,377.40

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Solution

The fourth proportional to 87,252.60, 130,878.90 and 81,377.40 is: 122,066.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,252.60 : 130,878.90 = 81,377.40 : x
  2. Step 2: Convert to fraction form
    87,252.60/130,878.90 = 81,377.40/x
  3. Step 3: Cross multiply
    87,252.60x = 130,878.90 × 81,377.40
  4. Step 4: Simplify right side
    87,252.60x = 10,650,584,596.86
  5. Step 5: Solve for x
    x = 10,650,584,596.86/87,252.60
  6. Step 6: Final answer
    x = 122,066.10

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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.