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Finding the Fourth Proportional to 132.42, 199.26 and 109.45

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Solution

The fourth proportional to 132.42, 199.26 and 109.45 is: 164.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.42 : 199.26 = 109.45 : x
  2. Step 2: Convert to fraction form
    132.42/199.26 = 109.45/x
  3. Step 3: Cross multiply
    132.42x = 199.26 × 109.45
  4. Step 4: Simplify right side
    132.42x = 21,809.26
  5. Step 5: Solve for x
    x = 21,809.26/132.42
  6. Step 6: Final answer
    x = 164.70

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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.