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Finding the Fourth Proportional to 196.63, 271.31 and 109.29

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Solution

The fourth proportional to 196.63, 271.31 and 109.29 is: 150.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.63 : 271.31 = 109.29 : x
  2. Step 2: Convert to fraction form
    196.63/271.31 = 109.29/x
  3. Step 3: Cross multiply
    196.63x = 271.31 × 109.29
  4. Step 4: Simplify right side
    196.63x = 29,651.74
  5. Step 5: Solve for x
    x = 29,651.74/196.63
  6. Step 6: Final answer
    x = 150.80

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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.