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Finding the Fourth Proportional to 160.16, 220.95 and 91.16

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Solution

The fourth proportional to 160.16, 220.95 and 91.16 is: 125.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.16 : 220.95 = 91.16 : x
  2. Step 2: Convert to fraction form
    160.16/220.95 = 91.16/x
  3. Step 3: Cross multiply
    160.16x = 220.95 × 91.16
  4. Step 4: Simplify right side
    160.16x = 20,140.70
  5. Step 5: Solve for x
    x = 20,140.70/160.16
  6. Step 6: Final answer
    x = 125.76

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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.