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Finding the Fourth Proportional to 125.62, 187.19 and 121.48

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Solution

The fourth proportional to 125.62, 187.19 and 121.48 is: 181.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.62 : 187.19 = 121.48 : x
  2. Step 2: Convert to fraction form
    125.62/187.19 = 121.48/x
  3. Step 3: Cross multiply
    125.62x = 187.19 × 121.48
  4. Step 4: Simplify right side
    125.62x = 22,740.27
  5. Step 5: Solve for x
    x = 22,740.27/125.62
  6. Step 6: Final answer
    x = 181.03

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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.