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Finding the Fourth Proportional to 170.81, 256.60 and 122.18

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Solution

The fourth proportional to 170.81, 256.60 and 122.18 is: 183.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.81 : 256.60 = 122.18 : x
  2. Step 2: Convert to fraction form
    170.81/256.60 = 122.18/x
  3. Step 3: Cross multiply
    170.81x = 256.60 × 122.18
  4. Step 4: Simplify right side
    170.81x = 31,352.03
  5. Step 5: Solve for x
    x = 31,352.03/170.81
  6. Step 6: Final answer
    x = 183.55

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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.