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Finding the Fourth Proportional to 71,576.43, 98,781.38 and 39,747.39

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Solution

The fourth proportional to 71,576.43, 98,781.38 and 39,747.39 is: 54,854.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,576.43 : 98,781.38 = 39,747.39 : x
  2. Step 2: Convert to fraction form
    71,576.43/98,781.38 = 39,747.39/x
  3. Step 3: Cross multiply
    71,576.43x = 98,781.38 × 39,747.39
  4. Step 4: Simplify right side
    71,576.43x = 3,926,302,035.60
  5. Step 5: Solve for x
    x = 3,926,302,035.60/71,576.43
  6. Step 6: Final answer
    x = 54,854.68

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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.