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Finding the Fourth Proportional to 68,869, 103,293.78 and 22,115.80

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Solution

The fourth proportional to 68,869, 103,293.78 and 22,115.80 is: 33,170.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,869 : 103,293.78 = 22,115.80 : x
  2. Step 2: Convert to fraction form
    68,869/103,293.78 = 22,115.80/x
  3. Step 3: Cross multiply
    68,869x = 103,293.78 × 22,115.80
  4. Step 4: Simplify right side
    68,869x = 2,284,424,579.72
  5. Step 5: Solve for x
    x = 2,284,424,579.72/68,869
  6. Step 6: Final answer
    x = 33,170.58

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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.