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Finding the Fourth Proportional to 71,489.35, 98,658.53 and 39,658.29

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Solution

The fourth proportional to 71,489.35, 98,658.53 and 39,658.29 is: 54,730.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,489.35 : 98,658.53 = 39,658.29 : x
  2. Step 2: Convert to fraction form
    71,489.35/98,658.53 = 39,658.29/x
  3. Step 3: Cross multiply
    71,489.35x = 98,658.53 × 39,658.29
  4. Step 4: Simplify right side
    71,489.35x = 3,912,628,593.71
  5. Step 5: Solve for x
    x = 3,912,628,593.71/71,489.35
  6. Step 6: Final answer
    x = 54,730.23

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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.