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Finding the Fourth Proportional to 77,912.10, 107,481.10 and 51,042.78

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Solution

The fourth proportional to 77,912.10, 107,481.10 and 51,042.78 is: 70,414.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,912.10 : 107,481.10 = 51,042.78 : x
  2. Step 2: Convert to fraction form
    77,912.10/107,481.10 = 51,042.78/x
  3. Step 3: Cross multiply
    77,912.10x = 107,481.10 × 51,042.78
  4. Step 4: Simplify right side
    77,912.10x = 5,486,134,141.46
  5. Step 5: Solve for x
    x = 5,486,134,141.46/77,912.10
  6. Step 6: Final answer
    x = 70,414.40

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1.5x scale

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.