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Finding the Fourth Proportional to 68,125.96, 102,204.32 and 20,745.29

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Solution

The fourth proportional to 68,125.96, 102,204.32 and 20,745.29 is: 31,122.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,125.96 : 102,204.32 = 20,745.29 : x
  2. Step 2: Convert to fraction form
    68,125.96/102,204.32 = 20,745.29/x
  3. Step 3: Cross multiply
    68,125.96x = 102,204.32 × 20,745.29
  4. Step 4: Simplify right side
    68,125.96x = 2,120,258,257.65
  5. Step 5: Solve for x
    x = 2,120,258,257.65/68,125.96
  6. Step 6: Final answer
    x = 31,122.62

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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.