Home / 87,357.90-131,036.85-80,942.70

Finding the Fourth Proportional to 87,357.90, 131,036.85 and 80,942.70

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Solution

The fourth proportional to 87,357.90, 131,036.85 and 80,942.70 is: 121,414.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,357.90 : 131,036.85 = 80,942.70 : x
  2. Step 2: Convert to fraction form
    87,357.90/131,036.85 = 80,942.70/x
  3. Step 3: Cross multiply
    87,357.90x = 131,036.85 × 80,942.70
  4. Step 4: Simplify right side
    87,357.90x = 10,606,476,438.50
  5. Step 5: Solve for x
    x = 10,606,476,438.50/87,357.90
  6. Step 6: Final answer
    x = 121,414.05

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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.