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Finding the Fourth Proportional to 196.63, 271.40 and 113.77

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Solution

The fourth proportional to 196.63, 271.40 and 113.77 is: 157.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.63 : 271.40 = 113.77 : x
  2. Step 2: Convert to fraction form
    196.63/271.40 = 113.77/x
  3. Step 3: Cross multiply
    196.63x = 271.40 × 113.77
  4. Step 4: Simplify right side
    196.63x = 30,876.44
  5. Step 5: Solve for x
    x = 30,876.44/196.63
  6. Step 6: Final answer
    x = 157.03

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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.