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Finding the Fourth Proportional to 132.39, 198.77 and 109.89

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Solution

The fourth proportional to 132.39, 198.77 and 109.89 is: 164.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.39 : 198.77 = 109.89 : x
  2. Step 2: Convert to fraction form
    132.39/198.77 = 109.89/x
  3. Step 3: Cross multiply
    132.39x = 198.77 × 109.89
  4. Step 4: Simplify right side
    132.39x = 21,842.29
  5. Step 5: Solve for x
    x = 21,842.29/132.39
  6. Step 6: Final answer
    x = 164.98

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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.