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Finding the Fourth Proportional to 68,745.22, 103,115.94 and 21,997.42

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Solution

The fourth proportional to 68,745.22, 103,115.94 and 21,997.42 is: 32,995.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,745.22 : 103,115.94 = 21,997.42 : x
  2. Step 2: Convert to fraction form
    68,745.22/103,115.94 = 21,997.42/x
  3. Step 3: Cross multiply
    68,745.22x = 103,115.94 × 21,997.42
  4. Step 4: Simplify right side
    68,745.22x = 2,268,284,640.87
  5. Step 5: Solve for x
    x = 2,268,284,640.87/68,745.22
  6. Step 6: Final answer
    x = 32,995.53

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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.