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Finding the Fourth Proportional to 68,471.18, 102,687.32 and 21,722.84

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Solution

The fourth proportional to 68,471.18, 102,687.32 and 21,722.84 is: 32,578.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,471.18 : 102,687.32 = 21,722.84 : x
  2. Step 2: Convert to fraction form
    68,471.18/102,687.32 = 21,722.84/x
  3. Step 3: Cross multiply
    68,471.18x = 102,687.32 × 21,722.84
  4. Step 4: Simplify right side
    68,471.18x = 2,230,660,222.39
  5. Step 5: Solve for x
    x = 2,230,660,222.39/68,471.18
  6. Step 6: Final answer
    x = 32,578.09

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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.