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Finding the Fourth Proportional to 196.84, 271.62 and 123.15

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Solution

The fourth proportional to 196.84, 271.62 and 123.15 is: 169.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.84 : 271.62 = 123.15 : x
  2. Step 2: Convert to fraction form
    196.84/271.62 = 123.15/x
  3. Step 3: Cross multiply
    196.84x = 271.62 × 123.15
  4. Step 4: Simplify right side
    196.84x = 33,450.00
  5. Step 5: Solve for x
    x = 33,450.00/196.84
  6. Step 6: Final answer
    x = 169.93

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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.