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Finding the Fourth Proportional to 137,672.10, 206,570.10 and 74,418.17

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Solution

The fourth proportional to 137,672.10, 206,570.10 and 74,418.17 is: 111,660.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,672.10 : 206,570.10 = 74,418.17 : x
  2. Step 2: Convert to fraction form
    137,672.10/206,570.10 = 74,418.17/x
  3. Step 3: Cross multiply
    137,672.10x = 206,570.10 × 74,418.17
  4. Step 4: Simplify right side
    137,672.10x = 15,372,567,785.87
  5. Step 5: Solve for x
    x = 15,372,567,785.87/137,672.10
  6. Step 6: Final answer
    x = 111,660.73

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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.