Home / 87,345.60-131,212.80-83,803.20

Finding the Fourth Proportional to 87,345.60, 131,212.80 and 83,803.20

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Solution

The fourth proportional to 87,345.60, 131,212.80 and 83,803.20 is: 125,891.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,345.60 : 131,212.80 = 83,803.20 : x
  2. Step 2: Convert to fraction form
    87,345.60/131,212.80 = 83,803.20/x
  3. Step 3: Cross multiply
    87,345.60x = 131,212.80 × 83,803.20
  4. Step 4: Simplify right side
    87,345.60x = 10,996,052,520.96
  5. Step 5: Solve for x
    x = 10,996,052,520.96/87,345.60
  6. Step 6: Final answer
    x = 125,891.32

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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.