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Finding the Fourth Proportional to 125.06, 186.63 and 111.43

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Solution

The fourth proportional to 125.06, 186.63 and 111.43 is: 166.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.06 : 186.63 = 111.43 : x
  2. Step 2: Convert to fraction form
    125.06/186.63 = 111.43/x
  3. Step 3: Cross multiply
    125.06x = 186.63 × 111.43
  4. Step 4: Simplify right side
    125.06x = 20,794.69
  5. Step 5: Solve for x
    x = 20,794.69/125.06
  6. Step 6: Final answer
    x = 166.28

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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.