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Finding the Fourth Proportional to 68,126.46, 102,205.07 and 20,745.79

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Solution

The fourth proportional to 68,126.46, 102,205.07 and 20,745.79 is: 31,123.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,126.46 : 102,205.07 = 20,745.79 : x
  2. Step 2: Convert to fraction form
    68,126.46/102,205.07 = 20,745.79/x
  3. Step 3: Cross multiply
    68,126.46x = 102,205.07 × 20,745.79
  4. Step 4: Simplify right side
    68,126.46x = 2,120,324,815.43
  5. Step 5: Solve for x
    x = 2,120,324,815.43/68,126.46
  6. Step 6: Final answer
    x = 31,123.37

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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.