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Finding the Fourth Proportional to 121.37, 181.85 and 104.22

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Solution

The fourth proportional to 121.37, 181.85 and 104.22 is: 156.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.37 : 181.85 = 104.22 : x
  2. Step 2: Convert to fraction form
    121.37/181.85 = 104.22/x
  3. Step 3: Cross multiply
    121.37x = 181.85 × 104.22
  4. Step 4: Simplify right side
    121.37x = 18,951.89
  5. Step 5: Solve for x
    x = 18,951.89/121.37
  6. Step 6: Final answer
    x = 156.16

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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.