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Finding the Fourth Proportional to 80,695, 121,061.94 and 25,291

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Solution

The fourth proportional to 80,695, 121,061.94 and 25,291 is: 37,942.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,695 : 121,061.94 = 25,291 : x
  2. Step 2: Convert to fraction form
    80,695/121,061.94 = 25,291/x
  3. Step 3: Cross multiply
    80,695x = 121,061.94 × 25,291
  4. Step 4: Simplify right side
    80,695x = 3,061,777,524.54
  5. Step 5: Solve for x
    x = 3,061,777,524.54/80,695
  6. Step 6: Final answer
    x = 37,942.59

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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.