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Finding the Fourth Proportional to 170.21, 234.88 and 104.71

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Solution

The fourth proportional to 170.21, 234.88 and 104.71 is: 144.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.21 : 234.88 = 104.71 : x
  2. Step 2: Convert to fraction form
    170.21/234.88 = 104.71/x
  3. Step 3: Cross multiply
    170.21x = 234.88 × 104.71
  4. Step 4: Simplify right side
    170.21x = 24,593.76
  5. Step 5: Solve for x
    x = 24,593.76/170.21
  6. Step 6: Final answer
    x = 144.49

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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.