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Finding the Fourth Proportional to 109.64, 163.60 and 97.46

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Solution

The fourth proportional to 109.64, 163.60 and 97.46 is: 145.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.64 : 163.60 = 97.46 : x
  2. Step 2: Convert to fraction form
    109.64/163.60 = 97.46/x
  3. Step 3: Cross multiply
    109.64x = 163.60 × 97.46
  4. Step 4: Simplify right side
    109.64x = 15,944.46
  5. Step 5: Solve for x
    x = 15,944.46/109.64
  6. Step 6: Final answer
    x = 145.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.