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Finding the Fourth Proportional to 71,437.45, 107,148.61 and 29,321.97

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Solution

The fourth proportional to 71,437.45, 107,148.61 and 29,321.97 is: 43,979.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,437.45 : 107,148.61 = 29,321.97 : x
  2. Step 2: Convert to fraction form
    71,437.45/107,148.61 = 29,321.97/x
  3. Step 3: Cross multiply
    71,437.45x = 107,148.61 × 29,321.97
  4. Step 4: Simplify right side
    71,437.45x = 3,141,808,181.35
  5. Step 5: Solve for x
    x = 3,141,808,181.35/71,437.45
  6. Step 6: Final answer
    x = 43,979.85

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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.