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Finding the Fourth Proportional to 108.85, 163.38 and 103.00

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Solution

The fourth proportional to 108.85, 163.38 and 103.00 is: 154.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.85 : 163.38 = 103.00 : x
  2. Step 2: Convert to fraction form
    108.85/163.38 = 103.00/x
  3. Step 3: Cross multiply
    108.85x = 163.38 × 103.00
  4. Step 4: Simplify right side
    108.85x = 16,827.10
  5. Step 5: Solve for x
    x = 16,827.10/108.85
  6. Step 6: Final answer
    x = 154.59

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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.