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Finding the Fourth Proportional to 160.04, 220.82 and 91

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Solution

The fourth proportional to 160.04, 220.82 and 91 is: 125.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.04 : 220.82 = 91 : x
  2. Step 2: Convert to fraction form
    160.04/220.82 = 91/x
  3. Step 3: Cross multiply
    160.04x = 220.82 × 91
  4. Step 4: Simplify right side
    160.04x = 20,094.62
  5. Step 5: Solve for x
    x = 20,094.62/160.04
  6. Step 6: Final answer
    x = 125.56

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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.