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Finding the Fourth Proportional to 135.33, 203.06 and 99.20

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Solution

The fourth proportional to 135.33, 203.06 and 99.20 is: 148.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.33 : 203.06 = 99.20 : x
  2. Step 2: Convert to fraction form
    135.33/203.06 = 99.20/x
  3. Step 3: Cross multiply
    135.33x = 203.06 × 99.20
  4. Step 4: Simplify right side
    135.33x = 20,142.04
  5. Step 5: Solve for x
    x = 20,142.04/135.33
  6. Step 6: Final answer
    x = 148.84

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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.