Home / 426,104.15-639,243.70-126,558.05

Finding the Fourth Proportional to 426,104.15, 639,243.70 and 126,558.05

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Solution

The fourth proportional to 426,104.15, 639,243.70 and 126,558.05 is: 189,863.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,104.15 : 639,243.70 = 126,558.05 : x
  2. Step 2: Convert to fraction form
    426,104.15/639,243.70 = 126,558.05/x
  3. Step 3: Cross multiply
    426,104.15x = 639,243.70 × 126,558.05
  4. Step 4: Simplify right side
    426,104.15x = 80,901,432,634.17
  5. Step 5: Solve for x
    x = 80,901,432,634.17/426,104.15
  6. Step 6: Final answer
    x = 189,863.05

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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.