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Finding the Fourth Proportional to 87,640.60, 131,493.30 and 84,400.60

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Solution

The fourth proportional to 87,640.60, 131,493.30 and 84,400.60 is: 126,632.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,640.60 : 131,493.30 = 84,400.60 : x
  2. Step 2: Convert to fraction form
    87,640.60/131,493.30 = 84,400.60/x
  3. Step 3: Cross multiply
    87,640.60x = 131,493.30 × 84,400.60
  4. Step 4: Simplify right side
    87,640.60x = 11,098,113,415.98
  5. Step 5: Solve for x
    x = 11,098,113,415.98/87,640.60
  6. Step 6: Final answer
    x = 126,632.10

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1.5x scale

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.