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Finding the Fourth Proportional to 218,419.06, 327,628.20 and 68,672.42

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Solution

The fourth proportional to 218,419.06, 327,628.20 and 68,672.42 is: 103,008.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,419.06 : 327,628.20 = 68,672.42 : x
  2. Step 2: Convert to fraction form
    218,419.06/327,628.20 = 68,672.42/x
  3. Step 3: Cross multiply
    218,419.06x = 327,628.20 × 68,672.42
  4. Step 4: Simplify right side
    218,419.06x = 22,499,021,354.24
  5. Step 5: Solve for x
    x = 22,499,021,354.24/218,419.06
  6. Step 6: Final answer
    x = 103,008.51

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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.