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Finding the Fourth Proportional to 74,487.10, 111,712.28 and 44,509.90

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Solution

The fourth proportional to 74,487.10, 111,712.28 and 44,509.90 is: 66,753.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,487.10 : 111,712.28 = 44,509.90 : x
  2. Step 2: Convert to fraction form
    74,487.10/111,712.28 = 44,509.90/x
  3. Step 3: Cross multiply
    74,487.10x = 111,712.28 × 44,509.90
  4. Step 4: Simplify right side
    74,487.10x = 4,972,302,411.57
  5. Step 5: Solve for x
    x = 4,972,302,411.57/74,487.10
  6. Step 6: Final answer
    x = 66,753.87

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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.