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Finding the Fourth Proportional to 196.43, 271.07 and 117.75

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Solution

The fourth proportional to 196.43, 271.07 and 117.75 is: 162.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.43 : 271.07 = 117.75 : x
  2. Step 2: Convert to fraction form
    196.43/271.07 = 117.75/x
  3. Step 3: Cross multiply
    196.43x = 271.07 × 117.75
  4. Step 4: Simplify right side
    196.43x = 31,918.49
  5. Step 5: Solve for x
    x = 31,918.49/196.43
  6. Step 6: Final answer
    x = 162.49

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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.