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Finding the Third Proportional to 51,528 and 79,620

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Solution

The third proportional to 51,528 and 79,620 is: 123,027.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,528 : 79,620 = 79,620 : x
  2. Step 2: Convert to fraction form
    51,528/79,620 = 79,620/x
  3. Step 3: Cross multiply
    51,528x = 79,620 × 79,620
  4. Step 4: Simplify right side
    51,528x = 6,339,344,400
  5. Step 5: Solve for x
    x = 6,339,344,400/51,528
  6. Step 6: Final answer
    x = 123,027.18

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.