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Finding the Fourth Proportional to 57,281.85, 79,046.87 and 31,789.33

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Solution

The fourth proportional to 57,281.85, 79,046.87 and 31,789.33 is: 43,868.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,281.85 : 79,046.87 = 31,789.33 : x
  2. Step 2: Convert to fraction form
    57,281.85/79,046.87 = 31,789.33/x
  3. Step 3: Cross multiply
    57,281.85x = 79,046.87 × 31,789.33
  4. Step 4: Simplify right side
    57,281.85x = 2,512,846,679.33
  5. Step 5: Solve for x
    x = 2,512,846,679.33/57,281.85
  6. Step 6: Final answer
    x = 43,868.11

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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.