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Finding the Fourth Proportional to 218,245.12, 327,381.52 and 68,491.32

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Solution

The fourth proportional to 218,245.12, 327,381.52 and 68,491.32 is: 102,741.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,245.12 : 327,381.52 = 68,491.32 : x
  2. Step 2: Convert to fraction form
    218,245.12/327,381.52 = 68,491.32/x
  3. Step 3: Cross multiply
    218,245.12x = 327,381.52 × 68,491.32
  4. Step 4: Simplify right side
    218,245.12x = 22,422,792,448.41
  5. Step 5: Solve for x
    x = 22,422,792,448.41/218,245.12
  6. Step 6: Final answer
    x = 102,741.32

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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.