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Finding the Third Proportional to 76,240 and 102,408

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Solution

The third proportional to 76,240 and 102,408 is: 137,557.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,240 : 102,408 = 102,408 : x
  2. Step 2: Convert to fraction form
    76,240/102,408 = 102,408/x
  3. Step 3: Cross multiply
    76,240x = 102,408 × 102,408
  4. Step 4: Simplify right side
    76,240x = 10,487,398,464
  5. Step 5: Solve for x
    x = 10,487,398,464/76,240
  6. Step 6: Final answer
    x = 137,557.69

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.