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Finding the Fourth Proportional to 182.96, 252.45 and 120.81

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Solution

The fourth proportional to 182.96, 252.45 and 120.81 is: 166.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.96 : 252.45 = 120.81 : x
  2. Step 2: Convert to fraction form
    182.96/252.45 = 120.81/x
  3. Step 3: Cross multiply
    182.96x = 252.45 × 120.81
  4. Step 4: Simplify right side
    182.96x = 30,498.48
  5. Step 5: Solve for x
    x = 30,498.48/182.96
  6. Step 6: Final answer
    x = 166.70

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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.