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Finding the Third Proportional to 81,220.50 and 127,440

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Solution

The third proportional to 81,220.50 and 127,440 is: 199,961.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,220.50 : 127,440 = 127,440 : x
  2. Step 2: Convert to fraction form
    81,220.50/127,440 = 127,440/x
  3. Step 3: Cross multiply
    81,220.50x = 127,440 × 127,440
  4. Step 4: Simplify right side
    81,220.50x = 16,240,953,600
  5. Step 5: Solve for x
    x = 16,240,953,600/81,220.50
  6. Step 6: Final answer
    x = 199,961.26

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.