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Finding the Fourth Proportional to 125,389.46, 188,114.56 and 72,115.52

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Solution

The fourth proportional to 125,389.46, 188,114.56 and 72,115.52 is: 108,190.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,389.46 : 188,114.56 = 72,115.52 : x
  2. Step 2: Convert to fraction form
    125,389.46/188,114.56 = 72,115.52/x
  3. Step 3: Cross multiply
    125,389.46x = 188,114.56 × 72,115.52
  4. Step 4: Simplify right side
    125,389.46x = 13,565,979,313.97
  5. Step 5: Solve for x
    x = 13,565,979,313.97/125,389.46
  6. Step 6: Final answer
    x = 108,190.75

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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.