Home / 87,543.70-131,315.55-82,359.70

Finding the Fourth Proportional to 87,543.70, 131,315.55 and 82,359.70

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Solution

The fourth proportional to 87,543.70, 131,315.55 and 82,359.70 is: 123,539.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,543.70 : 131,315.55 = 82,359.70 : x
  2. Step 2: Convert to fraction form
    87,543.70/131,315.55 = 82,359.70/x
  3. Step 3: Cross multiply
    87,543.70x = 131,315.55 × 82,359.70
  4. Step 4: Simplify right side
    87,543.70x = 10,815,109,303.34
  5. Step 5: Solve for x
    x = 10,815,109,303.34/87,543.70
  6. Step 6: Final answer
    x = 123,539.55

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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.