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Finding the Fourth Proportional to 207,806.90, 311,513.07 and 67,467.38

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Solution

The fourth proportional to 207,806.90, 311,513.07 and 67,467.38 is: 101,137.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,806.90 : 311,513.07 = 67,467.38 : x
  2. Step 2: Convert to fraction form
    207,806.90/311,513.07 = 67,467.38/x
  3. Step 3: Cross multiply
    207,806.90x = 311,513.07 × 67,467.38
  4. Step 4: Simplify right side
    207,806.90x = 21,016,970,668.66
  5. Step 5: Solve for x
    x = 21,016,970,668.66/207,806.90
  6. Step 6: Final answer
    x = 101,137.02

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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.