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Finding the Fourth Proportional to 125,159.90, 187,411.77 and 85,793.90

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Solution

The fourth proportional to 125,159.90, 187,411.77 and 85,793.90 is: 128,465.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,159.90 : 187,411.77 = 85,793.90 : x
  2. Step 2: Convert to fraction form
    125,159.90/187,411.77 = 85,793.90/x
  3. Step 3: Cross multiply
    125,159.90x = 187,411.77 × 85,793.90
  4. Step 4: Simplify right side
    125,159.90x = 16,078,787,122.73
  5. Step 5: Solve for x
    x = 16,078,787,122.73/125,159.90
  6. Step 6: Final answer
    x = 128,465.96

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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.