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Finding the Fourth Proportional to 68,857.56, 103,286.88 and 18,938.52

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Solution

The fourth proportional to 68,857.56, 103,286.88 and 18,938.52 is: 28,407.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,857.56 : 103,286.88 = 18,938.52 : x
  2. Step 2: Convert to fraction form
    68,857.56/103,286.88 = 18,938.52/x
  3. Step 3: Cross multiply
    68,857.56x = 103,286.88 × 18,938.52
  4. Step 4: Simplify right side
    68,857.56x = 1,956,100,642.62
  5. Step 5: Solve for x
    x = 1,956,100,642.62/68,857.56
  6. Step 6: Final answer
    x = 28,407.93

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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.