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Finding the Third Proportional to 45 and 61.50

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Solution

The third proportional to 45 and 61.50 is: 84.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    45 : 61.50 = 61.50 : x
  2. Step 2: Convert to fraction form
    45/61.50 = 61.50/x
  3. Step 3: Cross multiply
    45x = 61.50 × 61.50
  4. Step 4: Simplify right side
    45x = 3,782.25
  5. Step 5: Solve for x
    x = 3,782.25/45
  6. Step 6: Final answer
    x = 84.05

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.