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Finding the Fourth Proportional to 124.20, 185.40 and 116.10

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Solution

The fourth proportional to 124.20, 185.40 and 116.10 is: 173.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.20 : 185.40 = 116.10 : x
  2. Step 2: Convert to fraction form
    124.20/185.40 = 116.10/x
  3. Step 3: Cross multiply
    124.20x = 185.40 × 116.10
  4. Step 4: Simplify right side
    124.20x = 21,524.94
  5. Step 5: Solve for x
    x = 21,524.94/124.20
  6. Step 6: Final answer
    x = 173.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.