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Finding the Fourth Proportional to 196.68, 295.05 and 66.70

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Solution

The fourth proportional to 196.68, 295.05 and 66.70 is: 100.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.68 : 295.05 = 66.70 : x
  2. Step 2: Convert to fraction form
    196.68/295.05 = 66.70/x
  3. Step 3: Cross multiply
    196.68x = 295.05 × 66.70
  4. Step 4: Simplify right side
    196.68x = 19,680.40
  5. Step 5: Solve for x
    x = 19,680.40/196.68
  6. Step 6: Final answer
    x = 100.06

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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.