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Finding the Fourth Proportional to 138,937.96, 208,382.46 and 39,074.44

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Solution

The fourth proportional to 138,937.96, 208,382.46 and 39,074.44 is: 58,604.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,937.96 : 208,382.46 = 39,074.44 : x
  2. Step 2: Convert to fraction form
    138,937.96/208,382.46 = 39,074.44/x
  3. Step 3: Cross multiply
    138,937.96x = 208,382.46 × 39,074.44
  4. Step 4: Simplify right side
    138,937.96x = 8,142,427,930.32
  5. Step 5: Solve for x
    x = 8,142,427,930.32/138,937.96
  6. Step 6: Final answer
    x = 58,604.78

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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.