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Finding the Fourth Proportional to 218,134.50, 327,205.90 and 68,371.50

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Solution

The fourth proportional to 218,134.50, 327,205.90 and 68,371.50 is: 102,558.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,134.50 : 327,205.90 = 68,371.50 : x
  2. Step 2: Convert to fraction form
    218,134.50/327,205.90 = 68,371.50/x
  3. Step 3: Cross multiply
    218,134.50x = 327,205.90 × 68,371.50
  4. Step 4: Simplify right side
    218,134.50x = 22,371,558,191.85
  5. Step 5: Solve for x
    x = 22,371,558,191.85/218,134.50
  6. Step 6: Final answer
    x = 102,558.55

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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.