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Finding the Fourth Proportional to 124,545.90, 186,865.59 and 74,661.54

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Solution

The fourth proportional to 124,545.90, 186,865.59 and 74,661.54 is: 112,020.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,545.90 : 186,865.59 = 74,661.54 : x
  2. Step 2: Convert to fraction form
    124,545.90/186,865.59 = 74,661.54/x
  3. Step 3: Cross multiply
    124,545.90x = 186,865.59 × 74,661.54
  4. Step 4: Simplify right side
    124,545.90x = 13,951,672,722.41
  5. Step 5: Solve for x
    x = 13,951,672,722.41/124,545.90
  6. Step 6: Final answer
    x = 112,020.33

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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.