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Finding the Fourth Proportional to 196.15, 270.64 and 117.49

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Solution

The fourth proportional to 196.15, 270.64 and 117.49 is: 162.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.15 : 270.64 = 117.49 : x
  2. Step 2: Convert to fraction form
    196.15/270.64 = 117.49/x
  3. Step 3: Cross multiply
    196.15x = 270.64 × 117.49
  4. Step 4: Simplify right side
    196.15x = 31,797.49
  5. Step 5: Solve for x
    x = 31,797.49/196.15
  6. Step 6: Final answer
    x = 162.11

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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.