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Finding the Fourth Proportional to 115,712.80, 173,569.20 and 96,029.80

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Solution

The fourth proportional to 115,712.80, 173,569.20 and 96,029.80 is: 144,044.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,712.80 : 173,569.20 = 96,029.80 : x
  2. Step 2: Convert to fraction form
    115,712.80/173,569.20 = 96,029.80/x
  3. Step 3: Cross multiply
    115,712.80x = 173,569.20 × 96,029.80
  4. Step 4: Simplify right side
    115,712.80x = 16,667,815,562.16
  5. Step 5: Solve for x
    x = 16,667,815,562.16/115,712.80
  6. Step 6: Final answer
    x = 144,044.70

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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.