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Finding the Fourth Proportional to 186.99, 258.02 and 104.09

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Solution

The fourth proportional to 186.99, 258.02 and 104.09 is: 143.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    186.99 : 258.02 = 104.09 : x
  2. Step 2: Convert to fraction form
    186.99/258.02 = 104.09/x
  3. Step 3: Cross multiply
    186.99x = 258.02 × 104.09
  4. Step 4: Simplify right side
    186.99x = 26,857.30
  5. Step 5: Solve for x
    x = 26,857.30/186.99
  6. Step 6: Final answer
    x = 143.63

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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.