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Finding the Fourth Proportional to 165.25, 228.04 and 91.56

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Solution

The fourth proportional to 165.25, 228.04 and 91.56 is: 126.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.25 : 228.04 = 91.56 : x
  2. Step 2: Convert to fraction form
    165.25/228.04 = 91.56/x
  3. Step 3: Cross multiply
    165.25x = 228.04 × 91.56
  4. Step 4: Simplify right side
    165.25x = 20,879.97
  5. Step 5: Solve for x
    x = 20,879.97/165.25
  6. Step 6: Final answer
    x = 126.35

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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.