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Finding the Fourth Proportional to 185.86, 279.33 and 89.74

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Solution

The fourth proportional to 185.86, 279.33 and 89.74 is: 134.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.86 : 279.33 = 89.74 : x
  2. Step 2: Convert to fraction form
    185.86/279.33 = 89.74/x
  3. Step 3: Cross multiply
    185.86x = 279.33 × 89.74
  4. Step 4: Simplify right side
    185.86x = 25,067.07
  5. Step 5: Solve for x
    x = 25,067.07/185.86
  6. Step 6: Final answer
    x = 134.87

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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.