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Finding the Third Proportional to 99,078 and 213,636

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Solution

The third proportional to 99,078 and 213,636 is: 460,650.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,078 : 213,636 = 213,636 : x
  2. Step 2: Convert to fraction form
    99,078/213,636 = 213,636/x
  3. Step 3: Cross multiply
    99,078x = 213,636 × 213,636
  4. Step 4: Simplify right side
    99,078x = 45,640,340,496
  5. Step 5: Solve for x
    x = 45,640,340,496/99,078
  6. Step 6: Final answer
    x = 460,650.60

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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.