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Finding the Fourth Proportional to 87,355.40, 131,033.10 and 80,940.20

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Solution

The fourth proportional to 87,355.40, 131,033.10 and 80,940.20 is: 121,410.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,355.40 : 131,033.10 = 80,940.20 : x
  2. Step 2: Convert to fraction form
    87,355.40/131,033.10 = 80,940.20/x
  3. Step 3: Cross multiply
    87,355.40x = 131,033.10 × 80,940.20
  4. Step 4: Simplify right side
    87,355.40x = 10,605,845,320.62
  5. Step 5: Solve for x
    x = 10,605,845,320.62/87,355.40
  6. Step 6: Final answer
    x = 121,410.30

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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.