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Finding the Fourth Proportional to 80,452.76, 120,668.68 and 21,293

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Solution

The fourth proportional to 80,452.76, 120,668.68 and 21,293 is: 31,936.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,452.76 : 120,668.68 = 21,293 : x
  2. Step 2: Convert to fraction form
    80,452.76/120,668.68 = 21,293/x
  3. Step 3: Cross multiply
    80,452.76x = 120,668.68 × 21,293
  4. Step 4: Simplify right side
    80,452.76x = 2,569,398,203.24
  5. Step 5: Solve for x
    x = 2,569,398,203.24/80,452.76
  6. Step 6: Final answer
    x = 31,936.73

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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.