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Finding the Fourth Proportional to 124.39, 186.36 and 76.19

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Solution

The fourth proportional to 124.39, 186.36 and 76.19 is: 114.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.39 : 186.36 = 76.19 : x
  2. Step 2: Convert to fraction form
    124.39/186.36 = 76.19/x
  3. Step 3: Cross multiply
    124.39x = 186.36 × 76.19
  4. Step 4: Simplify right side
    124.39x = 14,198.77
  5. Step 5: Solve for x
    x = 14,198.77/124.39
  6. Step 6: Final answer
    x = 114.15

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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.