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Finding the Fourth Proportional to 51,481.92, 71,047.92 and 28,820.40

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Solution

The fourth proportional to 51,481.92, 71,047.92 and 28,820.40 is: 39,773.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,481.92 : 71,047.92 = 28,820.40 : x
  2. Step 2: Convert to fraction form
    51,481.92/71,047.92 = 28,820.40/x
  3. Step 3: Cross multiply
    51,481.92x = 71,047.92 × 28,820.40
  4. Step 4: Simplify right side
    51,481.92x = 2,047,629,473.57
  5. Step 5: Solve for x
    x = 2,047,629,473.57/51,481.92
  6. Step 6: Final answer
    x = 39,773.76

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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.