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Finding the Fourth Proportional to 414,081.45, 621,121.41 and 129,793.86

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Solution

The fourth proportional to 414,081.45, 621,121.41 and 129,793.86 is: 194,690.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,081.45 : 621,121.41 = 129,793.86 : x
  2. Step 2: Convert to fraction form
    414,081.45/621,121.41 = 129,793.86/x
  3. Step 3: Cross multiply
    414,081.45x = 621,121.41 × 129,793.86
  4. Step 4: Simplify right side
    414,081.45x = 80,617,745,332.54
  5. Step 5: Solve for x
    x = 80,617,745,332.54/414,081.45
  6. Step 6: Final answer
    x = 194,690.55

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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.