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Finding the Fourth Proportional to 71,449.68, 98,600.16 and 39,623.28

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Solution

The fourth proportional to 71,449.68, 98,600.16 and 39,623.28 is: 54,679.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,449.68 : 98,600.16 = 39,623.28 : x
  2. Step 2: Convert to fraction form
    71,449.68/98,600.16 = 39,623.28/x
  3. Step 3: Cross multiply
    71,449.68x = 98,600.16 × 39,623.28
  4. Step 4: Simplify right side
    71,449.68x = 3,906,861,747.72
  5. Step 5: Solve for x
    x = 3,906,861,747.72/71,449.68
  6. Step 6: Final answer
    x = 54,679.91

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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.