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Finding the Third Proportional to 77.63 and 140.06

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Solution

The third proportional to 77.63 and 140.06 is: 252.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.63 : 140.06 = 140.06 : x
  2. Step 2: Convert to fraction form
    77.63/140.06 = 140.06/x
  3. Step 3: Cross multiply
    77.63x = 140.06 × 140.06
  4. Step 4: Simplify right side
    77.63x = 19,617.50
  5. Step 5: Solve for x
    x = 19,617.50/77.63
  6. Step 6: Final answer
    x = 252.72

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Why These Related Problems?

These problems maintain the same ratio (1.80) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.