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Finding the Third Proportional to 69,780 and 102,402

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Solution

The third proportional to 69,780 and 102,402 is: 150,274.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,780 : 102,402 = 102,402 : x
  2. Step 2: Convert to fraction form
    69,780/102,402 = 102,402/x
  3. Step 3: Cross multiply
    69,780x = 102,402 × 102,402
  4. Step 4: Simplify right side
    69,780x = 10,486,169,604
  5. Step 5: Solve for x
    x = 10,486,169,604/69,780
  6. Step 6: Final answer
    x = 150,274.71

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.