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Finding the Third Proportional to 128,215 and 183,073

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Solution

The third proportional to 128,215 and 183,073 is: 261,402.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,215 : 183,073 = 183,073 : x
  2. Step 2: Convert to fraction form
    128,215/183,073 = 183,073/x
  3. Step 3: Cross multiply
    128,215x = 183,073 × 183,073
  4. Step 4: Simplify right side
    128,215x = 33,515,723,329
  5. Step 5: Solve for x
    x = 33,515,723,329/128,215
  6. Step 6: Final answer
    x = 261,402.51

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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.