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Finding the Third Proportional to 30,315 and 65,815

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Solution

The third proportional to 30,315 and 65,815 is: 142,886.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,315 : 65,815 = 65,815 : x
  2. Step 2: Convert to fraction form
    30,315/65,815 = 65,815/x
  3. Step 3: Cross multiply
    30,315x = 65,815 × 65,815
  4. Step 4: Simplify right side
    30,315x = 4,331,614,225
  5. Step 5: Solve for x
    x = 4,331,614,225/30,315
  6. Step 6: Final answer
    x = 142,886.83

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.