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Finding the Fourth Proportional to 108,617.20, 162,974.40 and 49,422.40

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Solution

The fourth proportional to 108,617.20, 162,974.40 and 49,422.40 is: 74,155.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,617.20 : 162,974.40 = 49,422.40 : x
  2. Step 2: Convert to fraction form
    108,617.20/162,974.40 = 49,422.40/x
  3. Step 3: Cross multiply
    108,617.20x = 162,974.40 × 49,422.40
  4. Step 4: Simplify right side
    108,617.20x = 8,054,585,986.56
  5. Step 5: Solve for x
    x = 8,054,585,986.56/108,617.20
  6. Step 6: Final answer
    x = 74,155.71

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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.