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Finding the Fourth Proportional to 68,436.96, 102,571.56 and 38,879.68

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Solution

The fourth proportional to 68,436.96, 102,571.56 and 38,879.68 is: 58,271.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,436.96 : 102,571.56 = 38,879.68 : x
  2. Step 2: Convert to fraction form
    68,436.96/102,571.56 = 38,879.68/x
  3. Step 3: Cross multiply
    68,436.96x = 102,571.56 × 38,879.68
  4. Step 4: Simplify right side
    68,436.96x = 3,987,949,429.90
  5. Step 5: Solve for x
    x = 3,987,949,429.90/68,436.96
  6. Step 6: Final answer
    x = 58,271.87

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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.