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Finding the Fourth Proportional to 124.05, 185.31 and 121.89

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Solution

The fourth proportional to 124.05, 185.31 and 121.89 is: 182.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.05 : 185.31 = 121.89 : x
  2. Step 2: Convert to fraction form
    124.05/185.31 = 121.89/x
  3. Step 3: Cross multiply
    124.05x = 185.31 × 121.89
  4. Step 4: Simplify right side
    124.05x = 22,587.44
  5. Step 5: Solve for x
    x = 22,587.44/124.05
  6. Step 6: Final answer
    x = 182.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.