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Finding the Third Proportional to 51,426 and 78,225

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Solution

The third proportional to 51,426 and 78,225 is: 118,989.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,426 : 78,225 = 78,225 : x
  2. Step 2: Convert to fraction form
    51,426/78,225 = 78,225/x
  3. Step 3: Cross multiply
    51,426x = 78,225 × 78,225
  4. Step 4: Simplify right side
    51,426x = 6,119,150,625
  5. Step 5: Solve for x
    x = 6,119,150,625/51,426
  6. Step 6: Final answer
    x = 118,989.43

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.