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Finding the Fourth Proportional to 124,879.92, 187,315.52 and 54,759.84

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Solution

The fourth proportional to 124,879.92, 187,315.52 and 54,759.84 is: 82,137.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,879.92 : 187,315.52 = 54,759.84 : x
  2. Step 2: Convert to fraction form
    124,879.92/187,315.52 = 54,759.84/x
  3. Step 3: Cross multiply
    124,879.92x = 187,315.52 × 54,759.84
  4. Step 4: Simplify right side
    124,879.92x = 10,257,367,904.72
  5. Step 5: Solve for x
    x = 10,257,367,904.72/124,879.92
  6. Step 6: Final answer
    x = 82,137.85

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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.