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Finding the Third Proportional to 81,390.50 and 126,009.50

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Solution

The third proportional to 81,390.50 and 126,009.50 is: 195,089.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,390.50 : 126,009.50 = 126,009.50 : x
  2. Step 2: Convert to fraction form
    81,390.50/126,009.50 = 126,009.50/x
  3. Step 3: Cross multiply
    81,390.50x = 126,009.50 × 126,009.50
  4. Step 4: Simplify right side
    81,390.50x = 15,878,394,090.25
  5. Step 5: Solve for x
    x = 15,878,394,090.25/81,390.50
  6. Step 6: Final answer
    x = 195,089.03

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.