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Finding the Fourth Proportional to 187.14, 279.90 and 135.48

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Solution

The fourth proportional to 187.14, 279.90 and 135.48 is: 202.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.14 : 279.90 = 135.48 : x
  2. Step 2: Convert to fraction form
    187.14/279.90 = 135.48/x
  3. Step 3: Cross multiply
    187.14x = 279.90 × 135.48
  4. Step 4: Simplify right side
    187.14x = 37,920.85
  5. Step 5: Solve for x
    x = 37,920.85/187.14
  6. Step 6: Final answer
    x = 202.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.