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Finding the Fourth Proportional to 74,420.97, 102,702.90 and 42,600.12

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Solution

The fourth proportional to 74,420.97, 102,702.90 and 42,600.12 is: 58,789.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,420.97 : 102,702.90 = 42,600.12 : x
  2. Step 2: Convert to fraction form
    74,420.97/102,702.90 = 42,600.12/x
  3. Step 3: Cross multiply
    74,420.97x = 102,702.90 × 42,600.12
  4. Step 4: Simplify right side
    74,420.97x = 4,375,155,864.35
  5. Step 5: Solve for x
    x = 4,375,155,864.35/74,420.97
  6. Step 6: Final answer
    x = 58,789.29

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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.