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Finding the Fourth Proportional to 124.78, 187.18 and 33.49

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Solution

The fourth proportional to 124.78, 187.18 and 33.49 is: 50.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.78 : 187.18 = 33.49 : x
  2. Step 2: Convert to fraction form
    124.78/187.18 = 33.49/x
  3. Step 3: Cross multiply
    124.78x = 187.18 × 33.49
  4. Step 4: Simplify right side
    124.78x = 6,267.55
  5. Step 5: Solve for x
    x = 6,267.55/124.78
  6. Step 6: Final answer
    x = 50.23

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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.