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Finding the Fourth Proportional to 57,422.46, 79,240.53 and 31,928.79

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Solution

The fourth proportional to 57,422.46, 79,240.53 and 31,928.79 is: 44,060.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,422.46 : 79,240.53 = 31,928.79 : x
  2. Step 2: Convert to fraction form
    57,422.46/79,240.53 = 31,928.79/x
  3. Step 3: Cross multiply
    57,422.46x = 79,240.53 × 31,928.79
  4. Step 4: Simplify right side
    57,422.46x = 2,530,054,241.86
  5. Step 5: Solve for x
    x = 2,530,054,241.86/57,422.46
  6. Step 6: Final answer
    x = 44,060.36

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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.