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Finding the Fourth Proportional to 68,448.65, 102,682.82 and 21,067.79

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Solution

The fourth proportional to 68,448.65, 102,682.82 and 21,067.79 is: 31,604.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,448.65 : 102,682.82 = 21,067.79 : x
  2. Step 2: Convert to fraction form
    68,448.65/102,682.82 = 21,067.79/x
  3. Step 3: Cross multiply
    68,448.65x = 102,682.82 × 21,067.79
  4. Step 4: Simplify right side
    68,448.65x = 2,163,299,627.62
  5. Step 5: Solve for x
    x = 2,163,299,627.62/68,448.65
  6. Step 6: Final answer
    x = 31,604.71

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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.