Home / 137,768.12-206,454.82-78,481.36

Finding the Fourth Proportional to 137,768.12, 206,454.82 and 78,481.36

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Solution

The fourth proportional to 137,768.12, 206,454.82 and 78,481.36 is: 117,609.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,768.12 : 206,454.82 = 78,481.36 : x
  2. Step 2: Convert to fraction form
    137,768.12/206,454.82 = 78,481.36/x
  3. Step 3: Cross multiply
    137,768.12x = 206,454.82 × 78,481.36
  4. Step 4: Simplify right side
    137,768.12x = 16,202,855,052.16
  5. Step 5: Solve for x
    x = 16,202,855,052.16/137,768.12
  6. Step 6: Final answer
    x = 117,609.61

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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.