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Finding the Fourth Proportional to 57,012.91, 85,425.87 and 40,291.27

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Solution

The fourth proportional to 57,012.91, 85,425.87 and 40,291.27 is: 60,370.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,012.91 : 85,425.87 = 40,291.27 : x
  2. Step 2: Convert to fraction form
    57,012.91/85,425.87 = 40,291.27/x
  3. Step 3: Cross multiply
    57,012.91x = 85,425.87 × 40,291.27
  4. Step 4: Simplify right side
    57,012.91x = 3,441,916,793.15
  5. Step 5: Solve for x
    x = 3,441,916,793.15/57,012.91
  6. Step 6: Final answer
    x = 60,370.83

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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.