Home / 132,731.82-198,997.62-80,128.80

Finding the Fourth Proportional to 132,731.82, 198,997.62 and 80,128.80

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Solution

The fourth proportional to 132,731.82, 198,997.62 and 80,128.80 is: 120,132.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,731.82 : 198,997.62 = 80,128.80 : x
  2. Step 2: Convert to fraction form
    132,731.82/198,997.62 = 80,128.80/x
  3. Step 3: Cross multiply
    132,731.82x = 198,997.62 × 80,128.80
  4. Step 4: Simplify right side
    132,731.82x = 15,945,440,493.46
  5. Step 5: Solve for x
    x = 15,945,440,493.46/132,731.82
  6. Step 6: Final answer
    x = 120,132.76

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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.