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Finding the Fourth Proportional to 132.20, 198.26 and 51

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Solution

The fourth proportional to 132.20, 198.26 and 51 is: 76.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.20 : 198.26 = 51 : x
  2. Step 2: Convert to fraction form
    132.20/198.26 = 51/x
  3. Step 3: Cross multiply
    132.20x = 198.26 × 51
  4. Step 4: Simplify right side
    132.20x = 10,111.26
  5. Step 5: Solve for x
    x = 10,111.26/132.20
  6. Step 6: Final answer
    x = 76.48

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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.