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Finding the Fourth Proportional to 170.66, 256.06 and 105.56

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Solution

The fourth proportional to 170.66, 256.06 and 105.56 is: 158.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.66 : 256.06 = 105.56 : x
  2. Step 2: Convert to fraction form
    170.66/256.06 = 105.56/x
  3. Step 3: Cross multiply
    170.66x = 256.06 × 105.56
  4. Step 4: Simplify right side
    170.66x = 27,030.50
  5. Step 5: Solve for x
    x = 27,030.50/170.66
  6. Step 6: Final answer
    x = 158.39

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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.