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Finding the Third Proportional to 34,600 and 74,720

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Solution

The third proportional to 34,600 and 74,720 is: 161,360.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,600 : 74,720 = 74,720 : x
  2. Step 2: Convert to fraction form
    34,600/74,720 = 74,720/x
  3. Step 3: Cross multiply
    34,600x = 74,720 × 74,720
  4. Step 4: Simplify right side
    34,600x = 5,583,078,400
  5. Step 5: Solve for x
    x = 5,583,078,400/34,600
  6. Step 6: Final answer
    x = 161,360.65

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.