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Finding the Fourth Proportional to 195.64, 270.05 and 143.17

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Solution

The fourth proportional to 195.64, 270.05 and 143.17 is: 197.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.64 : 270.05 = 143.17 : x
  2. Step 2: Convert to fraction form
    195.64/270.05 = 143.17/x
  3. Step 3: Cross multiply
    195.64x = 270.05 × 143.17
  4. Step 4: Simplify right side
    195.64x = 38,661.67
  5. Step 5: Solve for x
    x = 38,661.67/195.64
  6. Step 6: Final answer
    x = 197.62

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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.