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Finding the Third Proportional to 55,378 and 83,643

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Solution

The third proportional to 55,378 and 83,643 is: 126,334.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,378 : 83,643 = 83,643 : x
  2. Step 2: Convert to fraction form
    55,378/83,643 = 83,643/x
  3. Step 3: Cross multiply
    55,378x = 83,643 × 83,643
  4. Step 4: Simplify right side
    55,378x = 6,996,151,449
  5. Step 5: Solve for x
    x = 6,996,151,449/55,378
  6. Step 6: Final answer
    x = 126,334.49

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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.