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Finding the Fourth Proportional to 170.02, 234.25 and 128.44

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Solution

The fourth proportional to 170.02, 234.25 and 128.44 is: 176.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.02 : 234.25 = 128.44 : x
  2. Step 2: Convert to fraction form
    170.02/234.25 = 128.44/x
  3. Step 3: Cross multiply
    170.02x = 234.25 × 128.44
  4. Step 4: Simplify right side
    170.02x = 30,087.07
  5. Step 5: Solve for x
    x = 30,087.07/170.02
  6. Step 6: Final answer
    x = 176.96

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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.