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Finding the Fourth Proportional to 125.66, 187.99 and 108.73

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Solution

The fourth proportional to 125.66, 187.99 and 108.73 is: 162.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.66 : 187.99 = 108.73 : x
  2. Step 2: Convert to fraction form
    125.66/187.99 = 108.73/x
  3. Step 3: Cross multiply
    125.66x = 187.99 × 108.73
  4. Step 4: Simplify right side
    125.66x = 20,440.12
  5. Step 5: Solve for x
    x = 20,440.12/125.66
  6. Step 6: Final answer
    x = 162.66

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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.