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Finding the Fourth Proportional to 57,390.61, 79,197.94 and 31,896.67

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Solution

The fourth proportional to 57,390.61, 79,197.94 and 31,896.67 is: 44,016.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,390.61 : 79,197.94 = 31,896.67 : x
  2. Step 2: Convert to fraction form
    57,390.61/79,197.94 = 31,896.67/x
  3. Step 3: Cross multiply
    57,390.61x = 79,197.94 × 31,896.67
  4. Step 4: Simplify right side
    57,390.61x = 2,526,150,556.86
  5. Step 5: Solve for x
    x = 2,526,150,556.86/57,390.61
  6. Step 6: Final answer
    x = 44,016.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.