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Finding the Fourth Proportional to 87,400.60, 131,133.30 and 84,160.60

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Solution

The fourth proportional to 87,400.60, 131,133.30 and 84,160.60 is: 126,272.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,400.60 : 131,133.30 = 84,160.60 : x
  2. Step 2: Convert to fraction form
    87,400.60/131,133.30 = 84,160.60/x
  3. Step 3: Cross multiply
    87,400.60x = 131,133.30 × 84,160.60
  4. Step 4: Simplify right side
    87,400.60x = 11,036,257,207.98
  5. Step 5: Solve for x
    x = 11,036,257,207.98/87,400.60
  6. Step 6: Final answer
    x = 126,272.10

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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.