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Finding the Fourth Proportional to 160.68, 221.58 and 136.16

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Solution

The fourth proportional to 160.68, 221.58 and 136.16 is: 187.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.68 : 221.58 = 136.16 : x
  2. Step 2: Convert to fraction form
    160.68/221.58 = 136.16/x
  3. Step 3: Cross multiply
    160.68x = 221.58 × 136.16
  4. Step 4: Simplify right side
    160.68x = 30,170.33
  5. Step 5: Solve for x
    x = 30,170.33/160.68
  6. Step 6: Final answer
    x = 187.77

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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.