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Finding the Fourth Proportional to 236.60, 355.10 and 121.13

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Solution

The fourth proportional to 236.60, 355.10 and 121.13 is: 181.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.60 : 355.10 = 121.13 : x
  2. Step 2: Convert to fraction form
    236.60/355.10 = 121.13/x
  3. Step 3: Cross multiply
    236.60x = 355.10 × 121.13
  4. Step 4: Simplify right side
    236.60x = 43,011.79
  5. Step 5: Solve for x
    x = 43,011.79/236.60
  6. Step 6: Final answer
    x = 181.79

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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.