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Finding the Fourth Proportional to 125,153.78, 172,711.17 and 67,791.78

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Solution

The fourth proportional to 125,153.78, 172,711.17 and 67,791.78 is: 93,552.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,153.78 : 172,711.17 = 67,791.78 : x
  2. Step 2: Convert to fraction form
    125,153.78/172,711.17 = 67,791.78/x
  3. Step 3: Cross multiply
    125,153.78x = 172,711.17 × 67,791.78
  4. Step 4: Simplify right side
    125,153.78x = 11,708,397,640.18
  5. Step 5: Solve for x
    x = 11,708,397,640.18/125,153.78
  6. Step 6: Final answer
    x = 93,552.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.