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Finding the Third Proportional to 51,858 and 78,264

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Solution

The third proportional to 51,858 and 78,264 is: 118,115.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,858 : 78,264 = 78,264 : x
  2. Step 2: Convert to fraction form
    51,858/78,264 = 78,264/x
  3. Step 3: Cross multiply
    51,858x = 78,264 × 78,264
  4. Step 4: Simplify right side
    51,858x = 6,125,253,696
  5. Step 5: Solve for x
    x = 6,125,253,696/51,858
  6. Step 6: Final answer
    x = 118,115.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.