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Finding the Fourth Proportional to 162.24, 243.72 and 132.12

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Solution

The fourth proportional to 162.24, 243.72 and 132.12 is: 198.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.24 : 243.72 = 132.12 : x
  2. Step 2: Convert to fraction form
    162.24/243.72 = 132.12/x
  3. Step 3: Cross multiply
    162.24x = 243.72 × 132.12
  4. Step 4: Simplify right side
    162.24x = 32,200.29
  5. Step 5: Solve for x
    x = 32,200.29/162.24
  6. Step 6: Final answer
    x = 198.47

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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.