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Finding the Third Proportional to 128,629 and 183,485

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Solution

The third proportional to 128,629 and 183,485 is: 261,735.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,629 : 183,485 = 183,485 : x
  2. Step 2: Convert to fraction form
    128,629/183,485 = 183,485/x
  3. Step 3: Cross multiply
    128,629x = 183,485 × 183,485
  4. Step 4: Simplify right side
    128,629x = 33,666,745,225
  5. Step 5: Solve for x
    x = 33,666,745,225/128,629
  6. Step 6: Final answer
    x = 261,735.26

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.