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Finding the Fourth Proportional to 71,542.33, 98,723.47 and 39,708.72

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Solution

The fourth proportional to 71,542.33, 98,723.47 and 39,708.72 is: 54,795.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,542.33 : 98,723.47 = 39,708.72 : x
  2. Step 2: Convert to fraction form
    71,542.33/98,723.47 = 39,708.72/x
  3. Step 3: Cross multiply
    71,542.33x = 98,723.47 × 39,708.72
  4. Step 4: Simplify right side
    71,542.33x = 3,920,182,627.66
  5. Step 5: Solve for x
    x = 3,920,182,627.66/71,542.33
  6. Step 6: Final answer
    x = 54,795.29

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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.