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Finding the Fourth Proportional to 130.80, 197.42 and 127.14

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Solution

The fourth proportional to 130.80, 197.42 and 127.14 is: 191.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.80 : 197.42 = 127.14 : x
  2. Step 2: Convert to fraction form
    130.80/197.42 = 127.14/x
  3. Step 3: Cross multiply
    130.80x = 197.42 × 127.14
  4. Step 4: Simplify right side
    130.80x = 25,099.98
  5. Step 5: Solve for x
    x = 25,099.98/130.80
  6. Step 6: Final answer
    x = 191.90

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.