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Finding the Fourth Proportional to 124,037.87, 185,909.16 and 86,394.12

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Solution

The fourth proportional to 124,037.87, 185,909.16 and 86,394.12 is: 129,488.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,037.87 : 185,909.16 = 86,394.12 : x
  2. Step 2: Convert to fraction form
    124,037.87/185,909.16 = 86,394.12/x
  3. Step 3: Cross multiply
    124,037.87x = 185,909.16 × 86,394.12
  4. Step 4: Simplify right side
    124,037.87x = 16,061,458,278.14
  5. Step 5: Solve for x
    x = 16,061,458,278.14/124,037.87
  6. Step 6: Final answer
    x = 129,488.35

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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.