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Finding the Fourth Proportional to 218,419.60, 327,629.40 and 129,627.40

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Solution

The fourth proportional to 218,419.60, 327,629.40 and 129,627.40 is: 194,441.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,419.60 : 327,629.40 = 129,627.40 : x
  2. Step 2: Convert to fraction form
    218,419.60/327,629.40 = 129,627.40/x
  3. Step 3: Cross multiply
    218,419.60x = 327,629.40 × 129,627.40
  4. Step 4: Simplify right side
    218,419.60x = 42,469,747,285.56
  5. Step 5: Solve for x
    x = 42,469,747,285.56/218,419.60
  6. Step 6: Final answer
    x = 194,441.10

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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.