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Finding the Fourth Proportional to 125,908.10, 188,862.15 and 72,691.10

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Solution

The fourth proportional to 125,908.10, 188,862.15 and 72,691.10 is: 109,036.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,908.10 : 188,862.15 = 72,691.10 : x
  2. Step 2: Convert to fraction form
    125,908.10/188,862.15 = 72,691.10/x
  3. Step 3: Cross multiply
    125,908.10x = 188,862.15 × 72,691.10
  4. Step 4: Simplify right side
    125,908.10x = 13,728,597,431.87
  5. Step 5: Solve for x
    x = 13,728,597,431.87/125,908.10
  6. Step 6: Final answer
    x = 109,036.65

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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.