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Finding the Fourth Proportional to 123.80, 186.77 and 110.43

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Solution

The fourth proportional to 123.80, 186.77 and 110.43 is: 166.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.80 : 186.77 = 110.43 : x
  2. Step 2: Convert to fraction form
    123.80/186.77 = 110.43/x
  3. Step 3: Cross multiply
    123.80x = 186.77 × 110.43
  4. Step 4: Simplify right side
    123.80x = 20,625.29
  5. Step 5: Solve for x
    x = 20,625.29/123.80
  6. Step 6: Final answer
    x = 166.61

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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.