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Finding the Fourth Proportional to 236.08, 354.09 and 91.75

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Solution

The fourth proportional to 236.08, 354.09 and 91.75 is: 137.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.08 : 354.09 = 91.75 : x
  2. Step 2: Convert to fraction form
    236.08/354.09 = 91.75/x
  3. Step 3: Cross multiply
    236.08x = 354.09 × 91.75
  4. Step 4: Simplify right side
    236.08x = 32,487.76
  5. Step 5: Solve for x
    x = 32,487.76/236.08
  6. Step 6: Final answer
    x = 137.61

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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.