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Finding the Fourth Proportional to 121.60, 181.96 and 121.48

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Solution

The fourth proportional to 121.60, 181.96 and 121.48 is: 181.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.60 : 181.96 = 121.48 : x
  2. Step 2: Convert to fraction form
    121.60/181.96 = 121.48/x
  3. Step 3: Cross multiply
    121.60x = 181.96 × 121.48
  4. Step 4: Simplify right side
    121.60x = 22,104.50
  5. Step 5: Solve for x
    x = 22,104.50/121.60
  6. Step 6: Final answer
    x = 181.78

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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.