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Finding the Fourth Proportional to 127,893.90, 176,488.11 and 71,304.78

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Solution

The fourth proportional to 127,893.90, 176,488.11 and 71,304.78 is: 98,397.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,893.90 : 176,488.11 = 71,304.78 : x
  2. Step 2: Convert to fraction form
    127,893.90/176,488.11 = 71,304.78/x
  3. Step 3: Cross multiply
    127,893.90x = 176,488.11 × 71,304.78
  4. Step 4: Simplify right side
    127,893.90x = 12,584,445,856.17
  5. Step 5: Solve for x
    x = 12,584,445,856.17/127,893.90
  6. Step 6: Final answer
    x = 98,397.55

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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.