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Finding the Fourth Proportional to 71,516.52, 98,693.88 and 39,687.48

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Solution

The fourth proportional to 71,516.52, 98,693.88 and 39,687.48 is: 54,769.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,516.52 : 98,693.88 = 39,687.48 : x
  2. Step 2: Convert to fraction form
    71,516.52/98,693.88 = 39,687.48/x
  3. Step 3: Cross multiply
    71,516.52x = 98,693.88 × 39,687.48
  4. Step 4: Simplify right side
    71,516.52x = 3,916,911,388.62
  5. Step 5: Solve for x
    x = 3,916,911,388.62/71,516.52
  6. Step 6: Final answer
    x = 54,769.32

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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.