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Finding the Fourth Proportional to 195.40, 269.59 and 112.48

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Solution

The fourth proportional to 195.40, 269.59 and 112.48 is: 155.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.40 : 269.59 = 112.48 : x
  2. Step 2: Convert to fraction form
    195.40/269.59 = 112.48/x
  3. Step 3: Cross multiply
    195.40x = 269.59 × 112.48
  4. Step 4: Simplify right side
    195.40x = 30,323.48
  5. Step 5: Solve for x
    x = 30,323.48/195.40
  6. Step 6: Final answer
    x = 155.19

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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.