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Finding the Fourth Proportional to 72,640.64, 100,252.20 and 43,976.10

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Solution

The fourth proportional to 72,640.64, 100,252.20 and 43,976.10 is: 60,691.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,640.64 : 100,252.20 = 43,976.10 : x
  2. Step 2: Convert to fraction form
    72,640.64/100,252.20 = 43,976.10/x
  3. Step 3: Cross multiply
    72,640.64x = 100,252.20 × 43,976.10
  4. Step 4: Simplify right side
    72,640.64x = 4,408,700,772.42
  5. Step 5: Solve for x
    x = 4,408,700,772.42/72,640.64
  6. Step 6: Final answer
    x = 60,691.93

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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.