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Finding the Fourth Proportional to 68,279.91, 102,419.87 and 21,536.43

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Solution

The fourth proportional to 68,279.91, 102,419.87 and 21,536.43 is: 32,304.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,279.91 : 102,419.87 = 21,536.43 : x
  2. Step 2: Convert to fraction form
    68,279.91/102,419.87 = 21,536.43/x
  3. Step 3: Cross multiply
    68,279.91x = 102,419.87 × 21,536.43
  4. Step 4: Simplify right side
    68,279.91x = 2,205,758,253.18
  5. Step 5: Solve for x
    x = 2,205,758,253.18/68,279.91
  6. Step 6: Final answer
    x = 32,304.65

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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.