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Finding the Fourth Proportional to 162.70, 243.97 and 54.47

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Solution

The fourth proportional to 162.70, 243.97 and 54.47 is: 81.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.70 : 243.97 = 54.47 : x
  2. Step 2: Convert to fraction form
    162.70/243.97 = 54.47/x
  3. Step 3: Cross multiply
    162.70x = 243.97 × 54.47
  4. Step 4: Simplify right side
    162.70x = 13,289.05
  5. Step 5: Solve for x
    x = 13,289.05/162.70
  6. Step 6: Final answer
    x = 81.68

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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.