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Finding the Third Proportional to 63,780 and 99,315

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Solution

The third proportional to 63,780 and 99,315 is: 154,648.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,780 : 99,315 = 99,315 : x
  2. Step 2: Convert to fraction form
    63,780/99,315 = 99,315/x
  3. Step 3: Cross multiply
    63,780x = 99,315 × 99,315
  4. Step 4: Simplify right side
    63,780x = 9,863,469,225
  5. Step 5: Solve for x
    x = 9,863,469,225/63,780
  6. Step 6: Final answer
    x = 154,648.31

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.