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Finding the Fourth Proportional to 170.66, 256.08 and 109.91

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Solution

The fourth proportional to 170.66, 256.08 and 109.91 is: 164.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.66 : 256.08 = 109.91 : x
  2. Step 2: Convert to fraction form
    170.66/256.08 = 109.91/x
  3. Step 3: Cross multiply
    170.66x = 256.08 × 109.91
  4. Step 4: Simplify right side
    170.66x = 28,144.47
  5. Step 5: Solve for x
    x = 28,144.47/170.66
  6. Step 6: Final answer
    x = 164.92

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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.