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Finding the Fourth Proportional to 68,997.54, 103,496.69 and 20,966.61

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Solution

The fourth proportional to 68,997.54, 103,496.69 and 20,966.61 is: 31,450.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,997.54 : 103,496.69 = 20,966.61 : x
  2. Step 2: Convert to fraction form
    68,997.54/103,496.69 = 20,966.61/x
  3. Step 3: Cross multiply
    68,997.54x = 103,496.69 × 20,966.61
  4. Step 4: Simplify right side
    68,997.54x = 2,169,974,630.69
  5. Step 5: Solve for x
    x = 2,169,974,630.69/68,997.54
  6. Step 6: Final answer
    x = 31,450.03

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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.