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Finding the Third Proportional to 76,889 and 103,458

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Solution

The third proportional to 76,889 and 103,458 is: 139,207.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,889 : 103,458 = 103,458 : x
  2. Step 2: Convert to fraction form
    76,889/103,458 = 103,458/x
  3. Step 3: Cross multiply
    76,889x = 103,458 × 103,458
  4. Step 4: Simplify right side
    76,889x = 10,703,557,764
  5. Step 5: Solve for x
    x = 10,703,557,764/76,889
  6. Step 6: Final answer
    x = 139,207.92

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.