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Finding the Fourth Proportional to 132.77, 197.98 and 120.45

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Solution

The fourth proportional to 132.77, 197.98 and 120.45 is: 179.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.77 : 197.98 = 120.45 : x
  2. Step 2: Convert to fraction form
    132.77/197.98 = 120.45/x
  3. Step 3: Cross multiply
    132.77x = 197.98 × 120.45
  4. Step 4: Simplify right side
    132.77x = 23,847.13
  5. Step 5: Solve for x
    x = 23,847.13/132.77
  6. Step 6: Final answer
    x = 179.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.