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Finding the Fourth Proportional to 71,912.69, 99,229.88 and 43,612.91

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Solution

The fourth proportional to 71,912.69, 99,229.88 and 43,612.91 is: 60,179.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,912.69 : 99,229.88 = 43,612.91 : x
  2. Step 2: Convert to fraction form
    71,912.69/99,229.88 = 43,612.91/x
  3. Step 3: Cross multiply
    71,912.69x = 99,229.88 × 43,612.91
  4. Step 4: Simplify right side
    71,912.69x = 4,327,703,438.63
  5. Step 5: Solve for x
    x = 4,327,703,438.63/71,912.69
  6. Step 6: Final answer
    x = 60,179.97

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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.