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Finding the Third Proportional to 42,624 and 66,865

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Solution

The third proportional to 42,624 and 66,865 is: 104,892.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,624 : 66,865 = 66,865 : x
  2. Step 2: Convert to fraction form
    42,624/66,865 = 66,865/x
  3. Step 3: Cross multiply
    42,624x = 66,865 × 66,865
  4. Step 4: Simplify right side
    42,624x = 4,470,928,225
  5. Step 5: Solve for x
    x = 4,470,928,225/42,624
  6. Step 6: Final answer
    x = 104,892.27

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.