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Finding the Third Proportional to 74.81 and 106.50

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Solution

The third proportional to 74.81 and 106.50 is: 151.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.81 : 106.50 = 106.50 : x
  2. Step 2: Convert to fraction form
    74.81/106.50 = 106.50/x
  3. Step 3: Cross multiply
    74.81x = 106.50 × 106.50
  4. Step 4: Simplify right side
    74.81x = 11,342.25
  5. Step 5: Solve for x
    x = 11,342.25/74.81
  6. Step 6: Final answer
    x = 151.61

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.