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Finding the Fourth Proportional to 218,661.72, 327,993.30 and 68,916.12

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Solution

The fourth proportional to 218,661.72, 327,993.30 and 68,916.12 is: 103,374.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,661.72 : 327,993.30 = 68,916.12 : x
  2. Step 2: Convert to fraction form
    218,661.72/327,993.30 = 68,916.12/x
  3. Step 3: Cross multiply
    218,661.72x = 327,993.30 × 68,916.12
  4. Step 4: Simplify right side
    218,661.72x = 22,604,025,622.00
  5. Step 5: Solve for x
    x = 22,604,025,622.00/218,661.72
  6. Step 6: Final answer
    x = 103,374.41

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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.