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Finding the Fourth Proportional to 124.87, 173.09 and 122.74

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Solution

The fourth proportional to 124.87, 173.09 and 122.74 is: 170.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.87 : 173.09 = 122.74 : x
  2. Step 2: Convert to fraction form
    124.87/173.09 = 122.74/x
  3. Step 3: Cross multiply
    124.87x = 173.09 × 122.74
  4. Step 4: Simplify right side
    124.87x = 21,244.74
  5. Step 5: Solve for x
    x = 21,244.74/124.87
  6. Step 6: Final answer
    x = 170.14

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.