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Finding the Fourth Proportional to 81,310.76, 121,962.48 and 33,906.32

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Solution

The fourth proportional to 81,310.76, 121,962.48 and 33,906.32 is: 50,857.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,310.76 : 121,962.48 = 33,906.32 : x
  2. Step 2: Convert to fraction form
    81,310.76/121,962.48 = 33,906.32/x
  3. Step 3: Cross multiply
    81,310.76x = 121,962.48 × 33,906.32
  4. Step 4: Simplify right side
    81,310.76x = 4,135,298,874.87
  5. Step 5: Solve for x
    x = 4,135,298,874.87/81,310.76
  6. Step 6: Final answer
    x = 50,857.95

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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.