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Finding the Fourth Proportional to 124.89, 187.32 and 92.43

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Solution

The fourth proportional to 124.89, 187.32 and 92.43 is: 138.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.89 : 187.32 = 92.43 : x
  2. Step 2: Convert to fraction form
    124.89/187.32 = 92.43/x
  3. Step 3: Cross multiply
    124.89x = 187.32 × 92.43
  4. Step 4: Simplify right side
    124.89x = 17,313.99
  5. Step 5: Solve for x
    x = 17,313.99/124.89
  6. Step 6: Final answer
    x = 138.63

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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.