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Finding the Third Proportional to 74.75 and 106.94

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Solution

The third proportional to 74.75 and 106.94 is: 152.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.75 : 106.94 = 106.94 : x
  2. Step 2: Convert to fraction form
    74.75/106.94 = 106.94/x
  3. Step 3: Cross multiply
    74.75x = 106.94 × 106.94
  4. Step 4: Simplify right side
    74.75x = 11,435.63
  5. Step 5: Solve for x
    x = 11,435.63/74.75
  6. Step 6: Final answer
    x = 152.99

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.