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Finding the Third Proportional to 66,905 and 91,745

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Solution

The third proportional to 66,905 and 91,745 is: 125,807.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,905 : 91,745 = 91,745 : x
  2. Step 2: Convert to fraction form
    66,905/91,745 = 91,745/x
  3. Step 3: Cross multiply
    66,905x = 91,745 × 91,745
  4. Step 4: Simplify right side
    66,905x = 8,417,145,025
  5. Step 5: Solve for x
    x = 8,417,145,025/66,905
  6. Step 6: Final answer
    x = 125,807.41

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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.