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Finding the Fourth Proportional to 170.90, 255.81 and 112.99

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Solution

The fourth proportional to 170.90, 255.81 and 112.99 is: 169.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.90 : 255.81 = 112.99 : x
  2. Step 2: Convert to fraction form
    170.90/255.81 = 112.99/x
  3. Step 3: Cross multiply
    170.90x = 255.81 × 112.99
  4. Step 4: Simplify right side
    170.90x = 28,903.97
  5. Step 5: Solve for x
    x = 28,903.97/170.90
  6. Step 6: Final answer
    x = 169.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.