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Finding the Fourth Proportional to 137,394.78, 206,114.31 and 67,279.56

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Solution

The fourth proportional to 137,394.78, 206,114.31 and 67,279.56 is: 100,930.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,394.78 : 206,114.31 = 67,279.56 : x
  2. Step 2: Convert to fraction form
    137,394.78/206,114.31 = 67,279.56/x
  3. Step 3: Cross multiply
    137,394.78x = 206,114.31 × 67,279.56
  4. Step 4: Simplify right side
    137,394.78x = 13,867,280,086.50
  5. Step 5: Solve for x
    x = 13,867,280,086.50/137,394.78
  6. Step 6: Final answer
    x = 100,930.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.