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Finding the Third Proportional to 99,389.53 and 220,828.78

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Solution

The third proportional to 99,389.53 and 220,828.78 is: 490,648.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,389.53 : 220,828.78 = 220,828.78 : x
  2. Step 2: Convert to fraction form
    99,389.53/220,828.78 = 220,828.78/x
  3. Step 3: Cross multiply
    99,389.53x = 220,828.78 × 220,828.78
  4. Step 4: Simplify right side
    99,389.53x = 48,765,350,628.36
  5. Step 5: Solve for x
    x = 48,765,350,628.36/99,389.53
  6. Step 6: Final answer
    x = 490,648.76

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.