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Finding the Third Proportional to 85,408.50 and 121,665.75

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Solution

The third proportional to 85,408.50 and 121,665.75 is: 173,314.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,408.50 : 121,665.75 = 121,665.75 : x
  2. Step 2: Convert to fraction form
    85,408.50/121,665.75 = 121,665.75/x
  3. Step 3: Cross multiply
    85,408.50x = 121,665.75 × 121,665.75
  4. Step 4: Simplify right side
    85,408.50x = 14,802,554,723.06
  5. Step 5: Solve for x
    x = 14,802,554,723.06/85,408.50
  6. Step 6: Final answer
    x = 173,314.77

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.