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Finding the Fourth Proportional to 96.10, 143.94 and 80.91

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Solution

The fourth proportional to 96.10, 143.94 and 80.91 is: 121.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.10 : 143.94 = 80.91 : x
  2. Step 2: Convert to fraction form
    96.10/143.94 = 80.91/x
  3. Step 3: Cross multiply
    96.10x = 143.94 × 80.91
  4. Step 4: Simplify right side
    96.10x = 11,646.19
  5. Step 5: Solve for x
    x = 11,646.19/96.10
  6. Step 6: Final answer
    x = 121.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.