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Finding the Fourth Proportional to 108.15, 163.23 and 104.34

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Solution

The fourth proportional to 108.15, 163.23 and 104.34 is: 157.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.15 : 163.23 = 104.34 : x
  2. Step 2: Convert to fraction form
    108.15/163.23 = 104.34/x
  3. Step 3: Cross multiply
    108.15x = 163.23 × 104.34
  4. Step 4: Simplify right side
    108.15x = 17,031.42
  5. Step 5: Solve for x
    x = 17,031.42/108.15
  6. Step 6: Final answer
    x = 157.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.