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Finding the Fourth Proportional to 124,565.47, 186,843.65 and 68,431.86

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Solution

The fourth proportional to 124,565.47, 186,843.65 and 68,431.86 is: 102,645.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,565.47 : 186,843.65 = 68,431.86 : x
  2. Step 2: Convert to fraction form
    124,565.47/186,843.65 = 68,431.86/x
  3. Step 3: Cross multiply
    124,565.47x = 186,843.65 × 68,431.86
  4. Step 4: Simplify right side
    124,565.47x = 12,786,058,156.53
  5. Step 5: Solve for x
    x = 12,786,058,156.53/124,565.47
  6. Step 6: Final answer
    x = 102,645.29

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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.