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Finding the Third Proportional to 20,861 and 45,078

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Solution

The third proportional to 20,861 and 45,078 is: 97,407.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861 : 45,078 = 45,078 : x
  2. Step 2: Convert to fraction form
    20,861/45,078 = 45,078/x
  3. Step 3: Cross multiply
    20,861x = 45,078 × 45,078
  4. Step 4: Simplify right side
    20,861x = 2,032,026,084
  5. Step 5: Solve for x
    x = 2,032,026,084/20,861
  6. Step 6: Final answer
    x = 97,407.89

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.