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Finding the Fourth Proportional to 160.75, 222.08 and 111.77

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Solution

The fourth proportional to 160.75, 222.08 and 111.77 is: 154.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.75 : 222.08 = 111.77 : x
  2. Step 2: Convert to fraction form
    160.75/222.08 = 111.77/x
  3. Step 3: Cross multiply
    160.75x = 222.08 × 111.77
  4. Step 4: Simplify right side
    160.75x = 24,821.05
  5. Step 5: Solve for x
    x = 24,821.05/160.75
  6. Step 6: Final answer
    x = 154.41

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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.