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Finding the Third Proportional to 85,729.13 and 128,589

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Solution

The third proportional to 85,729.13 and 128,589 is: 192,876.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,729.13 : 128,589 = 128,589 : x
  2. Step 2: Convert to fraction form
    85,729.13/128,589 = 128,589/x
  3. Step 3: Cross multiply
    85,729.13x = 128,589 × 128,589
  4. Step 4: Simplify right side
    85,729.13x = 16,535,130,921
  5. Step 5: Solve for x
    x = 16,535,130,921/85,729.13
  6. Step 6: Final answer
    x = 192,876.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.