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Finding the Fourth Proportional to 139,165.31, 208,756.39 and 39,332.97

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Solution

The fourth proportional to 139,165.31, 208,756.39 and 39,332.97 is: 59,001.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,165.31 : 208,756.39 = 39,332.97 : x
  2. Step 2: Convert to fraction form
    139,165.31/208,756.39 = 39,332.97/x
  3. Step 3: Cross multiply
    139,165.31x = 208,756.39 × 39,332.97
  4. Step 4: Simplify right side
    139,165.31x = 8,211,008,726.85
  5. Step 5: Solve for x
    x = 8,211,008,726.85/139,165.31
  6. Step 6: Final answer
    x = 59,001.83

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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.