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Finding the Fourth Proportional to 187.05, 258.17 and 108.36

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Solution

The fourth proportional to 187.05, 258.17 and 108.36 is: 149.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.05 : 258.17 = 108.36 : x
  2. Step 2: Convert to fraction form
    187.05/258.17 = 108.36/x
  3. Step 3: Cross multiply
    187.05x = 258.17 × 108.36
  4. Step 4: Simplify right side
    187.05x = 27,975.06
  5. Step 5: Solve for x
    x = 27,975.06/187.05
  6. Step 6: Final answer
    x = 149.56

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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.