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Finding the Fourth Proportional to 133.68, 199.98 and 99.54

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Solution

The fourth proportional to 133.68, 199.98 and 99.54 is: 148.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.68 : 199.98 = 99.54 : x
  2. Step 2: Convert to fraction form
    133.68/199.98 = 99.54/x
  3. Step 3: Cross multiply
    133.68x = 199.98 × 99.54
  4. Step 4: Simplify right side
    133.68x = 19,906.01
  5. Step 5: Solve for x
    x = 19,906.01/133.68
  6. Step 6: Final answer
    x = 148.91

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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.