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Finding the Third Proportional to 84,258 and 126,729

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Solution

The third proportional to 84,258 and 126,729 is: 190,607.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,258 : 126,729 = 126,729 : x
  2. Step 2: Convert to fraction form
    84,258/126,729 = 126,729/x
  3. Step 3: Cross multiply
    84,258x = 126,729 × 126,729
  4. Step 4: Simplify right side
    84,258x = 16,060,239,441
  5. Step 5: Solve for x
    x = 16,060,239,441/84,258
  6. Step 6: Final answer
    x = 190,607.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.