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Finding the Fourth Proportional to 71,665.54, 98,897.86 and 38,959.74

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Solution

The fourth proportional to 71,665.54, 98,897.86 and 38,959.74 is: 53,764.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,665.54 : 98,897.86 = 38,959.74 : x
  2. Step 2: Convert to fraction form
    71,665.54/98,897.86 = 38,959.74/x
  3. Step 3: Cross multiply
    71,665.54x = 98,897.86 × 38,959.74
  4. Step 4: Simplify right side
    71,665.54x = 3,853,034,912.16
  5. Step 5: Solve for x
    x = 3,853,034,912.16/71,665.54
  6. Step 6: Final answer
    x = 53,764.12

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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.