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Finding the Fourth Proportional to 125,729.52, 188,718.21 and 92,355.90

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Solution

The fourth proportional to 125,729.52, 188,718.21 and 92,355.90 is: 138,624.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,729.52 : 188,718.21 = 92,355.90 : x
  2. Step 2: Convert to fraction form
    125,729.52/188,718.21 = 92,355.90/x
  3. Step 3: Cross multiply
    125,729.52x = 188,718.21 × 92,355.90
  4. Step 4: Simplify right side
    125,729.52x = 17,429,240,130.94
  5. Step 5: Solve for x
    x = 17,429,240,130.94/125,729.52
  6. Step 6: Final answer
    x = 138,624.88

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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.