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Finding the Fourth Proportional to 121.50, 183.26 and 120.08

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Solution

The fourth proportional to 121.50, 183.26 and 120.08 is: 181.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.50 : 183.26 = 120.08 : x
  2. Step 2: Convert to fraction form
    121.50/183.26 = 120.08/x
  3. Step 3: Cross multiply
    121.50x = 183.26 × 120.08
  4. Step 4: Simplify right side
    121.50x = 22,006.62
  5. Step 5: Solve for x
    x = 22,006.62/121.50
  6. Step 6: Final answer
    x = 181.12

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.