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Finding the Fourth Proportional to 81,229.64, 121,844.46 and 43,820.60

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Solution

The fourth proportional to 81,229.64, 121,844.46 and 43,820.60 is: 65,730.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,229.64 : 121,844.46 = 43,820.60 : x
  2. Step 2: Convert to fraction form
    81,229.64/121,844.46 = 43,820.60/x
  3. Step 3: Cross multiply
    81,229.64x = 121,844.46 × 43,820.60
  4. Step 4: Simplify right side
    81,229.64x = 5,339,297,343.88
  5. Step 5: Solve for x
    x = 5,339,297,343.88/81,229.64
  6. Step 6: Final answer
    x = 65,730.90

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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.