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Finding the Fourth Proportional to 195.79, 270.19 and 112.90

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Solution

The fourth proportional to 195.79, 270.19 and 112.90 is: 155.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.79 : 270.19 = 112.90 : x
  2. Step 2: Convert to fraction form
    195.79/270.19 = 112.90/x
  3. Step 3: Cross multiply
    195.79x = 270.19 × 112.90
  4. Step 4: Simplify right side
    195.79x = 30,503.92
  5. Step 5: Solve for x
    x = 30,503.92/195.79
  6. Step 6: Final answer
    x = 155.80

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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.