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Finding the Fourth Proportional to 87,112.80, 130,474.80 and 67,327.20

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Solution

The fourth proportional to 87,112.80, 130,474.80 and 67,327.20 is: 100,840.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,112.80 : 130,474.80 = 67,327.20 : x
  2. Step 2: Convert to fraction form
    87,112.80/130,474.80 = 67,327.20/x
  3. Step 3: Cross multiply
    87,112.80x = 130,474.80 × 67,327.20
  4. Step 4: Simplify right side
    87,112.80x = 8,784,502,954.56
  5. Step 5: Solve for x
    x = 8,784,502,954.56/87,112.80
  6. Step 6: Final answer
    x = 100,840.55

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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.