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Finding the Third Proportional to 100,835 and 211,990

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Solution

The third proportional to 100,835 and 211,990 is: 445,676.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,835 : 211,990 = 211,990 : x
  2. Step 2: Convert to fraction form
    100,835/211,990 = 211,990/x
  3. Step 3: Cross multiply
    100,835x = 211,990 × 211,990
  4. Step 4: Simplify right side
    100,835x = 44,939,760,100
  5. Step 5: Solve for x
    x = 44,939,760,100/100,835
  6. Step 6: Final answer
    x = 445,676.20

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.