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Finding the Fourth Proportional to 68,936.92, 103,456.86 and 51,208.54

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Solution

The fourth proportional to 68,936.92, 103,456.86 and 51,208.54 is: 76,851.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,936.92 : 103,456.86 = 51,208.54 : x
  2. Step 2: Convert to fraction form
    68,936.92/103,456.86 = 51,208.54/x
  3. Step 3: Cross multiply
    68,936.92x = 103,456.86 × 51,208.54
  4. Step 4: Simplify right side
    68,936.92x = 5,297,874,753.58
  5. Step 5: Solve for x
    x = 5,297,874,753.58/68,936.92
  6. Step 6: Final answer
    x = 76,851.05

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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.