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Finding the Fourth Proportional to 220,873.60, 331,310.40 and 161,387.20

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Solution

The fourth proportional to 220,873.60, 331,310.40 and 161,387.20 is: 242,080.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,873.60 : 331,310.40 = 161,387.20 : x
  2. Step 2: Convert to fraction form
    220,873.60/331,310.40 = 161,387.20/x
  3. Step 3: Cross multiply
    220,873.60x = 331,310.40 × 161,387.20
  4. Step 4: Simplify right side
    220,873.60x = 53,469,257,786.88
  5. Step 5: Solve for x
    x = 53,469,257,786.88/220,873.60
  6. Step 6: Final answer
    x = 242,080.80

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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.