Home / 80,330.28-120,379.99-45,195.72

Finding the Fourth Proportional to 80,330.28, 120,379.99 and 45,195.72

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Solution

The fourth proportional to 80,330.28, 120,379.99 and 45,195.72 is: 67,728.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,330.28 : 120,379.99 = 45,195.72 : x
  2. Step 2: Convert to fraction form
    80,330.28/120,379.99 = 45,195.72/x
  3. Step 3: Cross multiply
    80,330.28x = 120,379.99 × 45,195.72
  4. Step 4: Simplify right side
    80,330.28x = 5,440,660,321.64
  5. Step 5: Solve for x
    x = 5,440,660,321.64/80,330.28
  6. Step 6: Final answer
    x = 67,728.64

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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.