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Finding the Fourth Proportional to 160.84, 221.96 and 87.15

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Solution

The fourth proportional to 160.84, 221.96 and 87.15 is: 120.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.84 : 221.96 = 87.15 : x
  2. Step 2: Convert to fraction form
    160.84/221.96 = 87.15/x
  3. Step 3: Cross multiply
    160.84x = 221.96 × 87.15
  4. Step 4: Simplify right side
    160.84x = 19,344.21
  5. Step 5: Solve for x
    x = 19,344.21/160.84
  6. Step 6: Final answer
    x = 120.27

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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.