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Finding the Fourth Proportional to 220,858.40, 331,287.60 and 80,621.60

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Solution

The fourth proportional to 220,858.40, 331,287.60 and 80,621.60 is: 120,932.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,858.40 : 331,287.60 = 80,621.60 : x
  2. Step 2: Convert to fraction form
    220,858.40/331,287.60 = 80,621.60/x
  3. Step 3: Cross multiply
    220,858.40x = 331,287.60 × 80,621.60
  4. Step 4: Simplify right side
    220,858.40x = 26,708,936,372.16
  5. Step 5: Solve for x
    x = 26,708,936,372.16/220,858.40
  6. Step 6: Final answer
    x = 120,932.40

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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.