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Finding the Fourth Proportional to 236.18, 353.95 and 99.19

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Solution

The fourth proportional to 236.18, 353.95 and 99.19 is: 148.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.18 : 353.95 = 99.19 : x
  2. Step 2: Convert to fraction form
    236.18/353.95 = 99.19/x
  3. Step 3: Cross multiply
    236.18x = 353.95 × 99.19
  4. Step 4: Simplify right side
    236.18x = 35,108.30
  5. Step 5: Solve for x
    x = 35,108.30/236.18
  6. Step 6: Final answer
    x = 148.65

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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.