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Finding the Fourth Proportional to 135,044.92, 186,372.90 and 74,620.85

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Solution

The fourth proportional to 135,044.92, 186,372.90 and 74,620.85 is: 102,982.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,044.92 : 186,372.90 = 74,620.85 : x
  2. Step 2: Convert to fraction form
    135,044.92/186,372.90 = 74,620.85/x
  3. Step 3: Cross multiply
    135,044.92x = 186,372.90 × 74,620.85
  4. Step 4: Simplify right side
    135,044.92x = 13,907,303,841.86
  5. Step 5: Solve for x
    x = 13,907,303,841.86/135,044.92
  6. Step 6: Final answer
    x = 102,982.80

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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.