Home / 412,105.09-618,246.05-127,789.53

Finding the Fourth Proportional to 412,105.09, 618,246.05 and 127,789.53

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Solution

The fourth proportional to 412,105.09, 618,246.05 and 127,789.53 is: 191,711.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,105.09 : 618,246.05 = 127,789.53 : x
  2. Step 2: Convert to fraction form
    412,105.09/618,246.05 = 127,789.53/x
  3. Step 3: Cross multiply
    412,105.09x = 618,246.05 × 127,789.53
  4. Step 4: Simplify right side
    412,105.09x = 79,005,372,473.33
  5. Step 5: Solve for x
    x = 79,005,372,473.33/412,105.09
  6. Step 6: Final answer
    x = 191,711.71

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1.5x scale

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.