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Finding the Fourth Proportional to 236.75, 354.89 and 99.87

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Solution

The fourth proportional to 236.75, 354.89 and 99.87 is: 149.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.75 : 354.89 = 99.87 : x
  2. Step 2: Convert to fraction form
    236.75/354.89 = 99.87/x
  3. Step 3: Cross multiply
    236.75x = 354.89 × 99.87
  4. Step 4: Simplify right side
    236.75x = 35,443.18
  5. Step 5: Solve for x
    x = 35,443.18/236.75
  6. Step 6: Final answer
    x = 149.71

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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.