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Finding the Fourth Proportional to 110.30, 166.30 and 103.70

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Solution

The fourth proportional to 110.30, 166.30 and 103.70 is: 156.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.30 : 166.30 = 103.70 : x
  2. Step 2: Convert to fraction form
    110.30/166.30 = 103.70/x
  3. Step 3: Cross multiply
    110.30x = 166.30 × 103.70
  4. Step 4: Simplify right side
    110.30x = 17,245.31
  5. Step 5: Solve for x
    x = 17,245.31/110.30
  6. Step 6: Final answer
    x = 156.35

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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.