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Finding the Fourth Proportional to 198,121, 273,411.78 and 108,697

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Solution

The fourth proportional to 198,121, 273,411.78 and 108,697 is: 150,004.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,121 : 273,411.78 = 108,697 : x
  2. Step 2: Convert to fraction form
    198,121/273,411.78 = 108,697/x
  3. Step 3: Cross multiply
    198,121x = 273,411.78 × 108,697
  4. Step 4: Simplify right side
    198,121x = 29,719,040,250.66
  5. Step 5: Solve for x
    x = 29,719,040,250.66/198,121
  6. Step 6: Final answer
    x = 150,004.49

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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.