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Finding the Fourth Proportional to 68,940.72, 103,427.28 and 22,191.84

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Solution

The fourth proportional to 68,940.72, 103,427.28 and 22,191.84 is: 33,292.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,940.72 : 103,427.28 = 22,191.84 : x
  2. Step 2: Convert to fraction form
    68,940.72/103,427.28 = 22,191.84/x
  3. Step 3: Cross multiply
    68,940.72x = 103,427.28 × 22,191.84
  4. Step 4: Simplify right side
    68,940.72x = 2,295,241,649.40
  5. Step 5: Solve for x
    x = 2,295,241,649.40/68,940.72
  6. Step 6: Final answer
    x = 33,292.97

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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.