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Finding the Fourth Proportional to 72,640.72, 100,251.91 and 43,976.04

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Solution

The fourth proportional to 72,640.72, 100,251.91 and 43,976.04 is: 60,691.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,640.72 : 100,251.91 = 43,976.04 : x
  2. Step 2: Convert to fraction form
    72,640.72/100,251.91 = 43,976.04/x
  3. Step 3: Cross multiply
    72,640.72x = 100,251.91 × 43,976.04
  4. Step 4: Simplify right side
    72,640.72x = 4,408,682,004.24
  5. Step 5: Solve for x
    x = 4,408,682,004.24/72,640.72
  6. Step 6: Final answer
    x = 60,691.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.