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Finding the Fourth Proportional to 110.97, 166.59 and 85.32

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Solution

The fourth proportional to 110.97, 166.59 and 85.32 is: 128.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.97 : 166.59 = 85.32 : x
  2. Step 2: Convert to fraction form
    110.97/166.59 = 85.32/x
  3. Step 3: Cross multiply
    110.97x = 166.59 × 85.32
  4. Step 4: Simplify right side
    110.97x = 14,213.46
  5. Step 5: Solve for x
    x = 14,213.46/110.97
  6. Step 6: Final answer
    x = 128.08

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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.