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Finding the Fourth Proportional to 196.13, 293.97 and 87.70

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Solution

The fourth proportional to 196.13, 293.97 and 87.70 is: 131.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.13 : 293.97 = 87.70 : x
  2. Step 2: Convert to fraction form
    196.13/293.97 = 87.70/x
  3. Step 3: Cross multiply
    196.13x = 293.97 × 87.70
  4. Step 4: Simplify right side
    196.13x = 25,781.17
  5. Step 5: Solve for x
    x = 25,781.17/196.13
  6. Step 6: Final answer
    x = 131.45

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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.