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Finding the Fourth Proportional to 151.74, 208.89 and 131.80

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Solution

The fourth proportional to 151.74, 208.89 and 131.80 is: 181.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.74 : 208.89 = 131.80 : x
  2. Step 2: Convert to fraction form
    151.74/208.89 = 131.80/x
  3. Step 3: Cross multiply
    151.74x = 208.89 × 131.80
  4. Step 4: Simplify right side
    151.74x = 27,531.70
  5. Step 5: Solve for x
    x = 27,531.70/151.74
  6. Step 6: Final answer
    x = 181.44

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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.