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Finding the Fourth Proportional to 160.20, 220.88 and 111.12

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Solution

The fourth proportional to 160.20, 220.88 and 111.12 is: 153.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.20 : 220.88 = 111.12 : x
  2. Step 2: Convert to fraction form
    160.20/220.88 = 111.12/x
  3. Step 3: Cross multiply
    160.20x = 220.88 × 111.12
  4. Step 4: Simplify right side
    160.20x = 24,544.19
  5. Step 5: Solve for x
    x = 24,544.19/160.20
  6. Step 6: Final answer
    x = 153.21

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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.