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Finding the Fourth Proportional to 208,891.73, 313,388.49 and 66,736.82

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Solution

The fourth proportional to 208,891.73, 313,388.49 and 66,736.82 is: 100,121.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,891.73 : 313,388.49 = 66,736.82 : x
  2. Step 2: Convert to fraction form
    208,891.73/313,388.49 = 66,736.82/x
  3. Step 3: Cross multiply
    208,891.73x = 313,388.49 × 66,736.82
  4. Step 4: Simplify right side
    208,891.73x = 20,914,551,247.20
  5. Step 5: Solve for x
    x = 20,914,551,247.20/208,891.73
  6. Step 6: Final answer
    x = 100,121.49

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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.