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Finding the Fourth Proportional to 132.61, 182.78 and 120.99

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Solution

The fourth proportional to 132.61, 182.78 and 120.99 is: 166.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.61 : 182.78 = 120.99 : x
  2. Step 2: Convert to fraction form
    132.61/182.78 = 120.99/x
  3. Step 3: Cross multiply
    132.61x = 182.78 × 120.99
  4. Step 4: Simplify right side
    132.61x = 22,115.43
  5. Step 5: Solve for x
    x = 22,115.43/132.61
  6. Step 6: Final answer
    x = 166.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.