Home / 87,408.18-131,013.05-76,857.80

Finding the Fourth Proportional to 87,408.18, 131,013.05 and 76,857.80

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Solution

The fourth proportional to 87,408.18, 131,013.05 and 76,857.80 is: 115,199.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,408.18 : 131,013.05 = 76,857.80 : x
  2. Step 2: Convert to fraction form
    87,408.18/131,013.05 = 76,857.80/x
  3. Step 3: Cross multiply
    87,408.18x = 131,013.05 × 76,857.80
  4. Step 4: Simplify right side
    87,408.18x = 10,069,373,754.94
  5. Step 5: Solve for x
    x = 10,069,373,754.94/87,408.18
  6. Step 6: Final answer
    x = 115,199.44

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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.