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Finding the Third Proportional to 57,086 and 90,915

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Solution

The third proportional to 57,086 and 90,915 is: 144,790.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,086 : 90,915 = 90,915 : x
  2. Step 2: Convert to fraction form
    57,086/90,915 = 90,915/x
  3. Step 3: Cross multiply
    57,086x = 90,915 × 90,915
  4. Step 4: Simplify right side
    57,086x = 8,265,537,225
  5. Step 5: Solve for x
    x = 8,265,537,225/57,086
  6. Step 6: Final answer
    x = 144,790.97

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.