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Finding the Third Proportional to 39 and 59.50

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Solution

The third proportional to 39 and 59.50 is: 90.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39 : 59.50 = 59.50 : x
  2. Step 2: Convert to fraction form
    39/59.50 = 59.50/x
  3. Step 3: Cross multiply
    39x = 59.50 × 59.50
  4. Step 4: Simplify right side
    39x = 3,540.25
  5. Step 5: Solve for x
    x = 3,540.25/39
  6. Step 6: Final answer
    x = 90.78

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.