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Finding the Fourth Proportional to 187.14, 280.74 and 90.92

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Solution

The fourth proportional to 187.14, 280.74 and 90.92 is: 136.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.14 : 280.74 = 90.92 : x
  2. Step 2: Convert to fraction form
    187.14/280.74 = 90.92/x
  3. Step 3: Cross multiply
    187.14x = 280.74 × 90.92
  4. Step 4: Simplify right side
    187.14x = 25,524.88
  5. Step 5: Solve for x
    x = 25,524.88/187.14
  6. Step 6: Final answer
    x = 136.39

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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.