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Finding the Fourth Proportional to 160.58, 221.59 and 91.58

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Solution

The fourth proportional to 160.58, 221.59 and 91.58 is: 126.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.58 : 221.59 = 91.58 : x
  2. Step 2: Convert to fraction form
    160.58/221.59 = 91.58/x
  3. Step 3: Cross multiply
    160.58x = 221.59 × 91.58
  4. Step 4: Simplify right side
    160.58x = 20,293.21
  5. Step 5: Solve for x
    x = 20,293.21/160.58
  6. Step 6: Final answer
    x = 126.37

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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.