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Finding the Third Proportional to 72,144 and 99,306

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Solution

The third proportional to 72,144 and 99,306 is: 136,694.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,144 : 99,306 = 99,306 : x
  2. Step 2: Convert to fraction form
    72,144/99,306 = 99,306/x
  3. Step 3: Cross multiply
    72,144x = 99,306 × 99,306
  4. Step 4: Simplify right side
    72,144x = 9,861,681,636
  5. Step 5: Solve for x
    x = 9,861,681,636/72,144
  6. Step 6: Final answer
    x = 136,694.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.