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Finding the Fourth Proportional to 162.54, 243.60 and 108.42

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Solution

The fourth proportional to 162.54, 243.60 and 108.42 is: 162.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    162.54 : 243.60 = 108.42 : x
  2. Step 2: Convert to fraction form
    162.54/243.60 = 108.42/x
  3. Step 3: Cross multiply
    162.54x = 243.60 × 108.42
  4. Step 4: Simplify right side
    162.54x = 26,411.11
  5. Step 5: Solve for x
    x = 26,411.11/162.54
  6. Step 6: Final answer
    x = 162.49

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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.