Home / 121,961.92-182,942.90-80,399.20

Finding the Fourth Proportional to 121,961.92, 182,942.90 and 80,399.20

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Solution

The fourth proportional to 121,961.92, 182,942.90 and 80,399.20 is: 120,598.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,961.92 : 182,942.90 = 80,399.20 : x
  2. Step 2: Convert to fraction form
    121,961.92/182,942.90 = 80,399.20/x
  3. Step 3: Cross multiply
    121,961.92x = 182,942.90 × 80,399.20
  4. Step 4: Simplify right side
    121,961.92x = 14,708,462,805.68
  5. Step 5: Solve for x
    x = 14,708,462,805.68/121,961.92
  6. Step 6: Final answer
    x = 120,598.81

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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.