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Finding the Fourth Proportional to 207,760.90, 311,787.15 and 133,062.70

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Solution

The fourth proportional to 207,760.90, 311,787.15 and 133,062.70 is: 199,687.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,760.90 : 311,787.15 = 133,062.70 : x
  2. Step 2: Convert to fraction form
    207,760.90/311,787.15 = 133,062.70/x
  3. Step 3: Cross multiply
    207,760.90x = 311,787.15 × 133,062.70
  4. Step 4: Simplify right side
    207,760.90x = 41,487,240,004.31
  5. Step 5: Solve for x
    x = 41,487,240,004.31/207,760.90
  6. Step 6: Final answer
    x = 199,687.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.