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Finding the Fourth Proportional to 52,874.21, 79,292.87 and 21,276.09

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Solution

The fourth proportional to 52,874.21, 79,292.87 and 21,276.09 is: 31,906.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,874.21 : 79,292.87 = 21,276.09 : x
  2. Step 2: Convert to fraction form
    52,874.21/79,292.87 = 21,276.09/x
  3. Step 3: Cross multiply
    52,874.21x = 79,292.87 × 21,276.09
  4. Step 4: Simplify right side
    52,874.21x = 1,687,042,132.10
  5. Step 5: Solve for x
    x = 1,687,042,132.10/52,874.21
  6. Step 6: Final answer
    x = 31,906.71

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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.