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Finding the Third Proportional to 85,065 and 128,280.75

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Solution

The third proportional to 85,065 and 128,280.75 is: 193,451.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,065 : 128,280.75 = 128,280.75 : x
  2. Step 2: Convert to fraction form
    85,065/128,280.75 = 128,280.75/x
  3. Step 3: Cross multiply
    85,065x = 128,280.75 × 128,280.75
  4. Step 4: Simplify right side
    85,065x = 16,455,950,820.56
  5. Step 5: Solve for x
    x = 16,455,950,820.56/85,065
  6. Step 6: Final answer
    x = 193,451.49

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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.