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Finding the Fourth Proportional to 124,718.67, 187,124.48 and 74,834.57

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Solution

The fourth proportional to 124,718.67, 187,124.48 and 74,834.57 is: 112,279.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,718.67 : 187,124.48 = 74,834.57 : x
  2. Step 2: Convert to fraction form
    124,718.67/187,124.48 = 74,834.57/x
  3. Step 3: Cross multiply
    124,718.67x = 187,124.48 × 74,834.57
  4. Step 4: Simplify right side
    124,718.67x = 14,003,378,687.48
  5. Step 5: Solve for x
    x = 14,003,378,687.48/124,718.67
  6. Step 6: Final answer
    x = 112,279.73

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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.