Home / 87,420.30-131,130.45-45,861.90

Finding the Fourth Proportional to 87,420.30, 131,130.45 and 45,861.90

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Solution

The fourth proportional to 87,420.30, 131,130.45 and 45,861.90 is: 68,792.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,420.30 : 131,130.45 = 45,861.90 : x
  2. Step 2: Convert to fraction form
    87,420.30/131,130.45 = 45,861.90/x
  3. Step 3: Cross multiply
    87,420.30x = 131,130.45 × 45,861.90
  4. Step 4: Simplify right side
    87,420.30x = 6,013,891,584.86
  5. Step 5: Solve for x
    x = 6,013,891,584.86/87,420.30
  6. Step 6: Final answer
    x = 68,792.85

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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.