Home / 394,436.25-591,359.13-128,037.78

Finding the Fourth Proportional to 394,436.25, 591,359.13 and 128,037.78

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Solution

The fourth proportional to 394,436.25, 591,359.13 and 128,037.78 is: 191,960.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,436.25 : 591,359.13 = 128,037.78 : x
  2. Step 2: Convert to fraction form
    394,436.25/591,359.13 = 128,037.78/x
  3. Step 3: Cross multiply
    394,436.25x = 591,359.13 × 128,037.78
  4. Step 4: Simplify right side
    394,436.25x = 75,716,310,187.93
  5. Step 5: Solve for x
    x = 75,716,310,187.93/394,436.25
  6. Step 6: Final answer
    x = 191,960.83

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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.