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Finding the Fourth Proportional to 109.17, 163.35 and 63.54

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Solution

The fourth proportional to 109.17, 163.35 and 63.54 is: 95.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.17 : 163.35 = 63.54 : x
  2. Step 2: Convert to fraction form
    109.17/163.35 = 63.54/x
  3. Step 3: Cross multiply
    109.17x = 163.35 × 63.54
  4. Step 4: Simplify right side
    109.17x = 10,379.26
  5. Step 5: Solve for x
    x = 10,379.26/109.17
  6. Step 6: Final answer
    x = 95.07

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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.