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Finding the Fourth Proportional to 71,755.84, 107,649.25 and 21,839.84

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Solution

The fourth proportional to 71,755.84, 107,649.25 and 21,839.84 is: 32,764.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,755.84 : 107,649.25 = 21,839.84 : x
  2. Step 2: Convert to fraction form
    71,755.84/107,649.25 = 21,839.84/x
  3. Step 3: Cross multiply
    71,755.84x = 107,649.25 × 21,839.84
  4. Step 4: Simplify right side
    71,755.84x = 2,351,042,935.33
  5. Step 5: Solve for x
    x = 2,351,042,935.33/71,755.84
  6. Step 6: Final answer
    x = 32,764.48

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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.