Home / 426,370.05-639,443.70-126,769.95

Finding the Fourth Proportional to 426,370.05, 639,443.70 and 126,769.95

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Solution

The fourth proportional to 426,370.05, 639,443.70 and 126,769.95 is: 190,121.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,370.05 : 639,443.70 = 126,769.95 : x
  2. Step 2: Convert to fraction form
    426,370.05/639,443.70 = 126,769.95/x
  3. Step 3: Cross multiply
    426,370.05x = 639,443.70 × 126,769.95
  4. Step 4: Simplify right side
    426,370.05x = 81,062,245,876.82
  5. Step 5: Solve for x
    x = 81,062,245,876.82/426,370.05
  6. Step 6: Final answer
    x = 190,121.81

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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.