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Finding the Fourth Proportional to 132.54, 198.65 and 99.93

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Solution

The fourth proportional to 132.54, 198.65 and 99.93 is: 149.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.54 : 198.65 = 99.93 : x
  2. Step 2: Convert to fraction form
    132.54/198.65 = 99.93/x
  3. Step 3: Cross multiply
    132.54x = 198.65 × 99.93
  4. Step 4: Simplify right side
    132.54x = 19,852.09
  5. Step 5: Solve for x
    x = 19,852.09/132.54
  6. Step 6: Final answer
    x = 149.79

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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.