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Finding the Fourth Proportional to 71,212.78, 98,265.06 and 39,377.32

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Solution

The fourth proportional to 71,212.78, 98,265.06 and 39,377.32 is: 54,335.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,212.78 : 98,265.06 = 39,377.32 : x
  2. Step 2: Convert to fraction form
    71,212.78/98,265.06 = 39,377.32/x
  3. Step 3: Cross multiply
    71,212.78x = 98,265.06 × 39,377.32
  4. Step 4: Simplify right side
    71,212.78x = 3,869,414,712.44
  5. Step 5: Solve for x
    x = 3,869,414,712.44/71,212.78
  6. Step 6: Final answer
    x = 54,335.96

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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.