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Finding the Third Proportional to 51,376 and 78,522

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Solution

The third proportional to 51,376 and 78,522 is: 120,011.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,376 : 78,522 = 78,522 : x
  2. Step 2: Convert to fraction form
    51,376/78,522 = 78,522/x
  3. Step 3: Cross multiply
    51,376x = 78,522 × 78,522
  4. Step 4: Simplify right side
    51,376x = 6,165,704,484
  5. Step 5: Solve for x
    x = 6,165,704,484/51,376
  6. Step 6: Final answer
    x = 120,011.38

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.