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Finding the Fourth Proportional to 68,757.19, 103,151.93 and 21,369.85

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Solution

The fourth proportional to 68,757.19, 103,151.93 and 21,369.85 is: 32,059.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,757.19 : 103,151.93 = 21,369.85 : x
  2. Step 2: Convert to fraction form
    68,757.19/103,151.93 = 21,369.85/x
  3. Step 3: Cross multiply
    68,757.19x = 103,151.93 × 21,369.85
  4. Step 4: Simplify right side
    68,757.19x = 2,204,340,906.58
  5. Step 5: Solve for x
    x = 2,204,340,906.58/68,757.19
  6. Step 6: Final answer
    x = 32,059.79

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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.