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Finding the Fourth Proportional to 68,816.52, 103,213.74 and 18,884.97

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Solution

The fourth proportional to 68,816.52, 103,213.74 and 18,884.97 is: 28,324.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,816.52 : 103,213.74 = 18,884.97 : x
  2. Step 2: Convert to fraction form
    68,816.52/103,213.74 = 18,884.97/x
  3. Step 3: Cross multiply
    68,816.52x = 103,213.74 × 18,884.97
  4. Step 4: Simplify right side
    68,816.52x = 1,949,188,383.49
  5. Step 5: Solve for x
    x = 1,949,188,383.49/68,816.52
  6. Step 6: Final answer
    x = 28,324.43

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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.