Home / 426,105.15-639,245.20-126,559.05

Finding the Fourth Proportional to 426,105.15, 639,245.20 and 126,559.05

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Solution

The fourth proportional to 426,105.15, 639,245.20 and 126,559.05 is: 189,864.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,105.15 : 639,245.20 = 126,559.05 : x
  2. Step 2: Convert to fraction form
    426,105.15/639,245.20 = 126,559.05/x
  3. Step 3: Cross multiply
    426,105.15x = 639,245.20 × 126,559.05
  4. Step 4: Simplify right side
    426,105.15x = 80,902,265,229.06
  5. Step 5: Solve for x
    x = 80,902,265,229.06/426,105.15
  6. Step 6: Final answer
    x = 189,864.56

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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.