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Finding the Fourth Proportional to 81,809.48, 122,716.96 and 22,640.20

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Solution

The fourth proportional to 81,809.48, 122,716.96 and 22,640.20 is: 33,961.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,809.48 : 122,716.96 = 22,640.20 : x
  2. Step 2: Convert to fraction form
    81,809.48/122,716.96 = 22,640.20/x
  3. Step 3: Cross multiply
    81,809.48x = 122,716.96 × 22,640.20
  4. Step 4: Simplify right side
    81,809.48x = 2,778,336,517.79
  5. Step 5: Solve for x
    x = 2,778,336,517.79/81,809.48
  6. Step 6: Final answer
    x = 33,961.06

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1.5x scale

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.