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Finding the Fourth Proportional to 139.73, 191.77 and 131.99

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Solution

The fourth proportional to 139.73, 191.77 and 131.99 is: 181.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.73 : 191.77 = 131.99 : x
  2. Step 2: Convert to fraction form
    139.73/191.77 = 131.99/x
  3. Step 3: Cross multiply
    139.73x = 191.77 × 131.99
  4. Step 4: Simplify right side
    139.73x = 25,310.43
  5. Step 5: Solve for x
    x = 25,310.43/139.73
  6. Step 6: Final answer
    x = 181.14

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.