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Finding the Fourth Proportional to 216.11, 323.96 and 124.70

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Solution

The fourth proportional to 216.11, 323.96 and 124.70 is: 186.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.11 : 323.96 = 124.70 : x
  2. Step 2: Convert to fraction form
    216.11/323.96 = 124.70/x
  3. Step 3: Cross multiply
    216.11x = 323.96 × 124.70
  4. Step 4: Simplify right side
    216.11x = 40,395.57
  5. Step 5: Solve for x
    x = 40,395.57/216.11
  6. Step 6: Final answer
    x = 186.93

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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.