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Finding the Fourth Proportional to 125.49, 173.98 and 121.04

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Solution

The fourth proportional to 125.49, 173.98 and 121.04 is: 167.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.49 : 173.98 = 121.04 : x
  2. Step 2: Convert to fraction form
    125.49/173.98 = 121.04/x
  3. Step 3: Cross multiply
    125.49x = 173.98 × 121.04
  4. Step 4: Simplify right side
    125.49x = 21,057.37
  5. Step 5: Solve for x
    x = 21,057.37/125.49
  6. Step 6: Final answer
    x = 167.80

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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.