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Finding the Fourth Proportional to 125.92, 173.78 and 74.18

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Solution

The fourth proportional to 125.92, 173.78 and 74.18 is: 102.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.92 : 173.78 = 74.18 : x
  2. Step 2: Convert to fraction form
    125.92/173.78 = 74.18/x
  3. Step 3: Cross multiply
    125.92x = 173.78 × 74.18
  4. Step 4: Simplify right side
    125.92x = 12,891.00
  5. Step 5: Solve for x
    x = 12,891.00/125.92
  6. Step 6: Final answer
    x = 102.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.