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Finding the Fourth Proportional to 71,815.39, 107,730.45 and 27,479.43

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Solution

The fourth proportional to 71,815.39, 107,730.45 and 27,479.43 is: 41,221.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,815.39 : 107,730.45 = 27,479.43 : x
  2. Step 2: Convert to fraction form
    71,815.39/107,730.45 = 27,479.43/x
  3. Step 3: Cross multiply
    71,815.39x = 107,730.45 × 27,479.43
  4. Step 4: Simplify right side
    71,815.39x = 2,960,371,359.64
  5. Step 5: Solve for x
    x = 2,960,371,359.64/71,815.39
  6. Step 6: Final answer
    x = 41,221.96

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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.