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Finding the Fourth Proportional to 68,758, 103,137.12 and 18,838.56

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Solution

The fourth proportional to 68,758, 103,137.12 and 18,838.56 is: 28,257.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,758 : 103,137.12 = 18,838.56 : x
  2. Step 2: Convert to fraction form
    68,758/103,137.12 = 18,838.56/x
  3. Step 3: Cross multiply
    68,758x = 103,137.12 × 18,838.56
  4. Step 4: Simplify right side
    68,758x = 1,942,954,823.35
  5. Step 5: Solve for x
    x = 1,942,954,823.35/68,758
  6. Step 6: Final answer
    x = 28,257.87

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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.