Home / 198,517.78-274,097.55-122,139.64

Finding the Fourth Proportional to 198,517.78, 274,097.55 and 122,139.64

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Solution

The fourth proportional to 198,517.78, 274,097.55 and 122,139.64 is: 168,640.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,517.78 : 274,097.55 = 122,139.64 : x
  2. Step 2: Convert to fraction form
    198,517.78/274,097.55 = 122,139.64/x
  3. Step 3: Cross multiply
    198,517.78x = 274,097.55 × 122,139.64
  4. Step 4: Simplify right side
    198,517.78x = 33,478,176,081.88
  5. Step 5: Solve for x
    x = 33,478,176,081.88/198,517.78
  6. Step 6: Final answer
    x = 168,640.69

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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.