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Finding the Fourth Proportional to 108.30, 162.42 and 39.82

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Solution

The fourth proportional to 108.30, 162.42 and 39.82 is: 59.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.30 : 162.42 = 39.82 : x
  2. Step 2: Convert to fraction form
    108.30/162.42 = 39.82/x
  3. Step 3: Cross multiply
    108.30x = 162.42 × 39.82
  4. Step 4: Simplify right side
    108.30x = 6,467.56
  5. Step 5: Solve for x
    x = 6,467.56/108.30
  6. Step 6: Final answer
    x = 59.72

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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.