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Finding the Fourth Proportional to 170.15, 234.95 and 111.18

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Solution

The fourth proportional to 170.15, 234.95 and 111.18 is: 153.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    170.15 : 234.95 = 111.18 : x
  2. Step 2: Convert to fraction form
    170.15/234.95 = 111.18/x
  3. Step 3: Cross multiply
    170.15x = 234.95 × 111.18
  4. Step 4: Simplify right side
    170.15x = 26,121.19
  5. Step 5: Solve for x
    x = 26,121.19/170.15
  6. Step 6: Final answer
    x = 153.52

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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.