Home / 87,459.20-120,711.64-55,621.96

Finding the Fourth Proportional to 87,459.20, 120,711.64 and 55,621.96

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Solution

The fourth proportional to 87,459.20, 120,711.64 and 55,621.96 is: 76,769.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,459.20 : 120,711.64 = 55,621.96 : x
  2. Step 2: Convert to fraction form
    87,459.20/120,711.64 = 55,621.96/x
  3. Step 3: Cross multiply
    87,459.20x = 120,711.64 × 55,621.96
  4. Step 4: Simplify right side
    87,459.20x = 6,714,218,011.61
  5. Step 5: Solve for x
    x = 6,714,218,011.61/87,459.20
  6. Step 6: Final answer
    x = 76,769.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.