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Finding the Fourth Proportional to 196.77, 295.15 and 66.73

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Solution

The fourth proportional to 196.77, 295.15 and 66.73 is: 100.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.77 : 295.15 = 66.73 : x
  2. Step 2: Convert to fraction form
    196.77/295.15 = 66.73/x
  3. Step 3: Cross multiply
    196.77x = 295.15 × 66.73
  4. Step 4: Simplify right side
    196.77x = 19,695.36
  5. Step 5: Solve for x
    x = 19,695.36/196.77
  6. Step 6: Final answer
    x = 100.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.