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Finding the Fourth Proportional to 87,231.60, 131,041.80 and 83,689.20

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Solution

The fourth proportional to 87,231.60, 131,041.80 and 83,689.20 is: 125,720.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,231.60 : 131,041.80 = 83,689.20 : x
  2. Step 2: Convert to fraction form
    87,231.60/131,041.80 = 83,689.20/x
  3. Step 3: Cross multiply
    87,231.60x = 131,041.80 × 83,689.20
  4. Step 4: Simplify right side
    87,231.60x = 10,966,783,408.56
  5. Step 5: Solve for x
    x = 10,966,783,408.56/87,231.60
  6. Step 6: Final answer
    x = 125,720.31

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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.