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Finding the Fourth Proportional to 57,753.42, 86,578.29 and 20,791.50

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Solution

The fourth proportional to 57,753.42, 86,578.29 and 20,791.50 is: 31,168.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,753.42 : 86,578.29 = 20,791.50 : x
  2. Step 2: Convert to fraction form
    57,753.42/86,578.29 = 20,791.50/x
  3. Step 3: Cross multiply
    57,753.42x = 86,578.29 × 20,791.50
  4. Step 4: Simplify right side
    57,753.42x = 1,800,092,516.54
  5. Step 5: Solve for x
    x = 1,800,092,516.54/57,753.42
  6. Step 6: Final answer
    x = 31,168.59

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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.