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Finding the Fourth Proportional to 81,714.30, 122,571.45 and 81,195.90

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Solution

The fourth proportional to 81,714.30, 122,571.45 and 81,195.90 is: 121,793.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,714.30 : 122,571.45 = 81,195.90 : x
  2. Step 2: Convert to fraction form
    81,714.30/122,571.45 = 81,195.90/x
  3. Step 3: Cross multiply
    81,714.30x = 122,571.45 × 81,195.90
  4. Step 4: Simplify right side
    81,714.30x = 9,952,299,197.06
  5. Step 5: Solve for x
    x = 9,952,299,197.06/81,714.30
  6. Step 6: Final answer
    x = 121,793.85

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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.