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Finding the Third Proportional to 79,478 and 168,432

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Solution

The third proportional to 79,478 and 168,432 is: 356,945.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,478 : 168,432 = 168,432 : x
  2. Step 2: Convert to fraction form
    79,478/168,432 = 168,432/x
  3. Step 3: Cross multiply
    79,478x = 168,432 × 168,432
  4. Step 4: Simplify right side
    79,478x = 28,369,338,624
  5. Step 5: Solve for x
    x = 28,369,338,624/79,478
  6. Step 6: Final answer
    x = 356,945.80

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.