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Finding the Fourth Proportional to 122,772.57, 169,424.92 and 68,323.82

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Solution

The fourth proportional to 122,772.57, 169,424.92 and 68,323.82 is: 94,286.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,772.57 : 169,424.92 = 68,323.82 : x
  2. Step 2: Convert to fraction form
    122,772.57/169,424.92 = 68,323.82/x
  3. Step 3: Cross multiply
    122,772.57x = 169,424.92 × 68,323.82
  4. Step 4: Simplify right side
    122,772.57x = 11,575,757,737.59
  5. Step 5: Solve for x
    x = 11,575,757,737.59/122,772.57
  6. Step 6: Final answer
    x = 94,286.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.