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Finding the Fourth Proportional to 160.58, 221.72 and 98.55

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Solution

The fourth proportional to 160.58, 221.72 and 98.55 is: 136.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.58 : 221.72 = 98.55 : x
  2. Step 2: Convert to fraction form
    160.58/221.72 = 98.55/x
  3. Step 3: Cross multiply
    160.58x = 221.72 × 98.55
  4. Step 4: Simplify right side
    160.58x = 21,850.01
  5. Step 5: Solve for x
    x = 21,850.01/160.58
  6. Step 6: Final answer
    x = 136.07

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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.