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Finding the Fourth Proportional to 218,138.40, 327,015.60 and 147,789.60

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Solution

The fourth proportional to 218,138.40, 327,015.60 and 147,789.60 is: 221,554.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,138.40 : 327,015.60 = 147,789.60 : x
  2. Step 2: Convert to fraction form
    218,138.40/327,015.60 = 147,789.60/x
  3. Step 3: Cross multiply
    218,138.40x = 327,015.60 × 147,789.60
  4. Step 4: Simplify right side
    218,138.40x = 48,329,504,717.76
  5. Step 5: Solve for x
    x = 48,329,504,717.76/218,138.40
  6. Step 6: Final answer
    x = 221,554.32

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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.