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Finding the Third Proportional to 30,724 and 66,910

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Solution

The third proportional to 30,724 and 66,910 is: 145,715.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,724 : 66,910 = 66,910 : x
  2. Step 2: Convert to fraction form
    30,724/66,910 = 66,910/x
  3. Step 3: Cross multiply
    30,724x = 66,910 × 66,910
  4. Step 4: Simplify right side
    30,724x = 4,476,948,100
  5. Step 5: Solve for x
    x = 4,476,948,100/30,724
  6. Step 6: Final answer
    x = 145,715.01

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.