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Finding the Fourth Proportional to 196.58, 271.28 and 113.70

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Solution

The fourth proportional to 196.58, 271.28 and 113.70 is: 156.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.58 : 271.28 = 113.70 : x
  2. Step 2: Convert to fraction form
    196.58/271.28 = 113.70/x
  3. Step 3: Cross multiply
    196.58x = 271.28 × 113.70
  4. Step 4: Simplify right side
    196.58x = 30,845.36
  5. Step 5: Solve for x
    x = 30,845.36/196.58
  6. Step 6: Final answer
    x = 156.91

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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.