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Finding the Third Proportional to 50.20 and 80.58

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Solution

The third proportional to 50.20 and 80.58 is: 129.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    50.20 : 80.58 = 80.58 : x
  2. Step 2: Convert to fraction form
    50.20/80.58 = 80.58/x
  3. Step 3: Cross multiply
    50.20x = 80.58 × 80.58
  4. Step 4: Simplify right side
    50.20x = 6,492.83
  5. Step 5: Solve for x
    x = 6,492.83/50.20
  6. Step 6: Final answer
    x = 129.33

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.