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Finding the Fourth Proportional to 188,189.82, 259,592.31 and 121,121.82

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Solution

The fourth proportional to 188,189.82, 259,592.31 and 121,121.82 is: 167,077.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,189.82 : 259,592.31 = 121,121.82 : x
  2. Step 2: Convert to fraction form
    188,189.82/259,592.31 = 121,121.82/x
  3. Step 3: Cross multiply
    188,189.82x = 259,592.31 × 121,121.82
  4. Step 4: Simplify right side
    188,189.82x = 31,442,293,045.20
  5. Step 5: Solve for x
    x = 31,442,293,045.20/188,189.82
  6. Step 6: Final answer
    x = 167,077.54

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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.