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Finding the Third Proportional to 51,985 and 78,347

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Solution

The third proportional to 51,985 and 78,347 is: 118,077.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,985 : 78,347 = 78,347 : x
  2. Step 2: Convert to fraction form
    51,985/78,347 = 78,347/x
  3. Step 3: Cross multiply
    51,985x = 78,347 × 78,347
  4. Step 4: Simplify right side
    51,985x = 6,138,252,409
  5. Step 5: Solve for x
    x = 6,138,252,409/51,985
  6. Step 6: Final answer
    x = 118,077.38

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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.