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Finding the Fourth Proportional to 162.52, 243.89 and 121.81

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Solution

The fourth proportional to 162.52, 243.89 and 121.81 is: 182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.52 : 243.89 = 121.81 : x
  2. Step 2: Convert to fraction form
    162.52/243.89 = 121.81/x
  3. Step 3: Cross multiply
    162.52x = 243.89 × 121.81
  4. Step 4: Simplify right side
    162.52x = 29,708.24
  5. Step 5: Solve for x
    x = 29,708.24/162.52
  6. Step 6: Final answer
    x = 182.80

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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.