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Finding the Fourth Proportional to 218,481.18, 327,387.90 and 147,140

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Solution

The fourth proportional to 218,481.18, 327,387.90 and 147,140 is: 220,485.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,481.18 : 327,387.90 = 147,140 : x
  2. Step 2: Convert to fraction form
    218,481.18/327,387.90 = 147,140/x
  3. Step 3: Cross multiply
    218,481.18x = 327,387.90 × 147,140
  4. Step 4: Simplify right side
    218,481.18x = 48,171,855,606
  5. Step 5: Solve for x
    x = 48,171,855,606/218,481.18
  6. Step 6: Final answer
    x = 220,485.15

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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.