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Finding the Fourth Proportional to 95.40, 143.26 and 91.96

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Solution

The fourth proportional to 95.40, 143.26 and 91.96 is: 138.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.40 : 143.26 = 91.96 : x
  2. Step 2: Convert to fraction form
    95.40/143.26 = 91.96/x
  3. Step 3: Cross multiply
    95.40x = 143.26 × 91.96
  4. Step 4: Simplify right side
    95.40x = 13,174.19
  5. Step 5: Solve for x
    x = 13,174.19/95.40
  6. Step 6: Final answer
    x = 138.09

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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.