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Finding the Third Proportional to 66,964 and 91,820

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Solution

The third proportional to 66,964 and 91,820 is: 125,902.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,964 : 91,820 = 91,820 : x
  2. Step 2: Convert to fraction form
    66,964/91,820 = 91,820/x
  3. Step 3: Cross multiply
    66,964x = 91,820 × 91,820
  4. Step 4: Simplify right side
    66,964x = 8,430,912,400
  5. Step 5: Solve for x
    x = 8,430,912,400/66,964
  6. Step 6: Final answer
    x = 125,902.16

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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.