Home / 87,640.40-131,460.60-84,141.20

Finding the Fourth Proportional to 87,640.40, 131,460.60 and 84,141.20

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Solution

The fourth proportional to 87,640.40, 131,460.60 and 84,141.20 is: 126,211.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,640.40 : 131,460.60 = 84,141.20 : x
  2. Step 2: Convert to fraction form
    87,640.40/131,460.60 = 84,141.20/x
  3. Step 3: Cross multiply
    87,640.40x = 131,460.60 × 84,141.20
  4. Step 4: Simplify right side
    87,640.40x = 11,061,252,636.72
  5. Step 5: Solve for x
    x = 11,061,252,636.72/87,640.40
  6. Step 6: Final answer
    x = 126,211.80

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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.