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Finding the Fourth Proportional to 68,872.64, 103,305.30 and 22,121.86

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Solution

The fourth proportional to 68,872.64, 103,305.30 and 22,121.86 is: 33,181.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,872.64 : 103,305.30 = 22,121.86 : x
  2. Step 2: Convert to fraction form
    68,872.64/103,305.30 = 22,121.86/x
  3. Step 3: Cross multiply
    68,872.64x = 103,305.30 × 22,121.86
  4. Step 4: Simplify right side
    68,872.64x = 2,285,305,383.86
  5. Step 5: Solve for x
    x = 2,285,305,383.86/68,872.64
  6. Step 6: Final answer
    x = 33,181.61

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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.