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Finding the Fourth Proportional to 160.08, 220.66 and 128.94

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Solution

The fourth proportional to 160.08, 220.66 and 128.94 is: 177.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.08 : 220.66 = 128.94 : x
  2. Step 2: Convert to fraction form
    160.08/220.66 = 128.94/x
  3. Step 3: Cross multiply
    160.08x = 220.66 × 128.94
  4. Step 4: Simplify right side
    160.08x = 28,451.90
  5. Step 5: Solve for x
    x = 28,451.90/160.08
  6. Step 6: Final answer
    x = 177.74

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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.