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Finding the Fourth Proportional to 124.15, 186.36 and 87.97

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Solution

The fourth proportional to 124.15, 186.36 and 87.97 is: 132.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.15 : 186.36 = 87.97 : x
  2. Step 2: Convert to fraction form
    124.15/186.36 = 87.97/x
  3. Step 3: Cross multiply
    124.15x = 186.36 × 87.97
  4. Step 4: Simplify right side
    124.15x = 16,392.72
  5. Step 5: Solve for x
    x = 16,392.72/124.15
  6. Step 6: Final answer
    x = 132.04

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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.