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Finding the Fourth Proportional to 68,517.84, 102,754.89 and 21,759.78

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Solution

The fourth proportional to 68,517.84, 102,754.89 and 21,759.78 is: 32,632.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,517.84 : 102,754.89 = 21,759.78 : x
  2. Step 2: Convert to fraction form
    68,517.84/102,754.89 = 21,759.78/x
  3. Step 3: Cross multiply
    68,517.84x = 102,754.89 × 21,759.78
  4. Step 4: Simplify right side
    68,517.84x = 2,235,923,800.32
  5. Step 5: Solve for x
    x = 2,235,923,800.32/68,517.84
  6. Step 6: Final answer
    x = 32,632.72

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1.5x scale

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.