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Finding the Fourth Proportional to 196.87, 271.72 and 113.99

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Solution

The fourth proportional to 196.87, 271.72 and 113.99 is: 157.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.87 : 271.72 = 113.99 : x
  2. Step 2: Convert to fraction form
    196.87/271.72 = 113.99/x
  3. Step 3: Cross multiply
    196.87x = 271.72 × 113.99
  4. Step 4: Simplify right side
    196.87x = 30,973.36
  5. Step 5: Solve for x
    x = 30,973.36/196.87
  6. Step 6: Final answer
    x = 157.33

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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.