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Finding the Fourth Proportional to 138,732.74, 208,115.10 and 48,747.81

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Solution

The fourth proportional to 138,732.74, 208,115.10 and 48,747.81 is: 73,127.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,732.74 : 208,115.10 = 48,747.81 : x
  2. Step 2: Convert to fraction form
    138,732.74/208,115.10 = 48,747.81/x
  3. Step 3: Cross multiply
    138,732.74x = 208,115.10 × 48,747.81
  4. Step 4: Simplify right side
    138,732.74x = 10,145,155,352.93
  5. Step 5: Solve for x
    x = 10,145,155,352.93/138,732.74
  6. Step 6: Final answer
    x = 73,127.34

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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.