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Finding the Third Proportional to 72,306 and 74,493

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Solution

The third proportional to 72,306 and 74,493 is: 76,746.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,306 : 74,493 = 74,493 : x
  2. Step 2: Convert to fraction form
    72,306/74,493 = 74,493/x
  3. Step 3: Cross multiply
    72,306x = 74,493 × 74,493
  4. Step 4: Simplify right side
    72,306x = 5,549,207,049
  5. Step 5: Solve for x
    x = 5,549,207,049/72,306
  6. Step 6: Final answer
    x = 76,746.15

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Why These Related Problems?

These problems maintain the same ratio (1.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.