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Finding the Fourth Proportional to 79,138.82, 109,211.90 and 43,332.17

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Solution

The fourth proportional to 79,138.82, 109,211.90 and 43,332.17 is: 59,798.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,138.82 : 109,211.90 = 43,332.17 : x
  2. Step 2: Convert to fraction form
    79,138.82/109,211.90 = 43,332.17/x
  3. Step 3: Cross multiply
    79,138.82x = 109,211.90 × 43,332.17
  4. Step 4: Simplify right side
    79,138.82x = 4,732,387,854.10
  5. Step 5: Solve for x
    x = 4,732,387,854.10/79,138.82
  6. Step 6: Final answer
    x = 59,798.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.