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Finding the Fourth Proportional to 196.55, 271.21 and 141.47

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Solution

The fourth proportional to 196.55, 271.21 and 141.47 is: 195.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.55 : 271.21 = 141.47 : x
  2. Step 2: Convert to fraction form
    196.55/271.21 = 141.47/x
  3. Step 3: Cross multiply
    196.55x = 271.21 × 141.47
  4. Step 4: Simplify right side
    196.55x = 38,368.08
  5. Step 5: Solve for x
    x = 38,368.08/196.55
  6. Step 6: Final answer
    x = 195.21

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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.