Home / 426,100.23-639,039.78-126,510.39

Finding the Fourth Proportional to 426,100.23, 639,039.78 and 126,510.39

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Solution

The fourth proportional to 426,100.23, 639,039.78 and 126,510.39 is: 189,732.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,100.23 : 639,039.78 = 126,510.39 : x
  2. Step 2: Convert to fraction form
    426,100.23/639,039.78 = 126,510.39/x
  3. Step 3: Cross multiply
    426,100.23x = 639,039.78 × 126,510.39
  4. Step 4: Simplify right side
    426,100.23x = 80,845,171,793.31
  5. Step 5: Solve for x
    x = 80,845,171,793.31/426,100.23
  6. Step 6: Final answer
    x = 189,732.76

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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.