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Finding the Fourth Proportional to 124.60, 187.20 and 121.56

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Solution

The fourth proportional to 124.60, 187.20 and 121.56 is: 182.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.60 : 187.20 = 121.56 : x
  2. Step 2: Convert to fraction form
    124.60/187.20 = 121.56/x
  3. Step 3: Cross multiply
    124.60x = 187.20 × 121.56
  4. Step 4: Simplify right side
    124.60x = 22,754.49
  5. Step 5: Solve for x
    x = 22,754.49/124.60
  6. Step 6: Final answer
    x = 182.63

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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.