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Finding the Fourth Proportional to 124.08, 186.11 and 83.21

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Solution

The fourth proportional to 124.08, 186.11 and 83.21 is: 124.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.08 : 186.11 = 83.21 : x
  2. Step 2: Convert to fraction form
    124.08/186.11 = 83.21/x
  3. Step 3: Cross multiply
    124.08x = 186.11 × 83.21
  4. Step 4: Simplify right side
    124.08x = 15,485.18
  5. Step 5: Solve for x
    x = 15,485.18/124.08
  6. Step 6: Final answer
    x = 124.80

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.