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Finding the Fourth Proportional to 236.42, 354.59 and 90.13

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Solution

The fourth proportional to 236.42, 354.59 and 90.13 is: 135.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.42 : 354.59 = 90.13 : x
  2. Step 2: Convert to fraction form
    236.42/354.59 = 90.13/x
  3. Step 3: Cross multiply
    236.42x = 354.59 × 90.13
  4. Step 4: Simplify right side
    236.42x = 31,958.54
  5. Step 5: Solve for x
    x = 31,958.54/236.42
  6. Step 6: Final answer
    x = 135.18

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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.