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Finding the Fourth Proportional to 68,855.38, 103,285.16 and 21,472.18

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Solution

The fourth proportional to 68,855.38, 103,285.16 and 21,472.18 is: 32,208.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,855.38 : 103,285.16 = 21,472.18 : x
  2. Step 2: Convert to fraction form
    68,855.38/103,285.16 = 21,472.18/x
  3. Step 3: Cross multiply
    68,855.38x = 103,285.16 × 21,472.18
  4. Step 4: Simplify right side
    68,855.38x = 2,217,757,546.85
  5. Step 5: Solve for x
    x = 2,217,757,546.85/68,855.38
  6. Step 6: Final answer
    x = 32,208.92

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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.