Home / 87,515.40-131,273.10-81,294.60

Finding the Fourth Proportional to 87,515.40, 131,273.10 and 81,294.60

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Solution

The fourth proportional to 87,515.40, 131,273.10 and 81,294.60 is: 121,941.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,515.40 : 131,273.10 = 81,294.60 : x
  2. Step 2: Convert to fraction form
    87,515.40/131,273.10 = 81,294.60/x
  3. Step 3: Cross multiply
    87,515.40x = 131,273.10 × 81,294.60
  4. Step 4: Simplify right side
    87,515.40x = 10,671,794,155.26
  5. Step 5: Solve for x
    x = 10,671,794,155.26/87,515.40
  6. Step 6: Final answer
    x = 121,941.90

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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.