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Finding the Fourth Proportional to 170.37, 234.87 and 139.23

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Solution

The fourth proportional to 170.37, 234.87 and 139.23 is: 191.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.37 : 234.87 = 139.23 : x
  2. Step 2: Convert to fraction form
    170.37/234.87 = 139.23/x
  3. Step 3: Cross multiply
    170.37x = 234.87 × 139.23
  4. Step 4: Simplify right side
    170.37x = 32,700.95
  5. Step 5: Solve for x
    x = 32,700.95/170.37
  6. Step 6: Final answer
    x = 191.94

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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.