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Finding the Fourth Proportional to 132.99, 199.49 and 131.20

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Solution

The fourth proportional to 132.99, 199.49 and 131.20 is: 196.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.99 : 199.49 = 131.20 : x
  2. Step 2: Convert to fraction form
    132.99/199.49 = 131.20/x
  3. Step 3: Cross multiply
    132.99x = 199.49 × 131.20
  4. Step 4: Simplify right side
    132.99x = 26,173.09
  5. Step 5: Solve for x
    x = 26,173.09/132.99
  6. Step 6: Final answer
    x = 196.80

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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.