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Finding the Third Proportional to 100,008.50 and 213,409

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Solution

The third proportional to 100,008.50 and 213,409 is: 455,395.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,008.50 : 213,409 = 213,409 : x
  2. Step 2: Convert to fraction form
    100,008.50/213,409 = 213,409/x
  3. Step 3: Cross multiply
    100,008.50x = 213,409 × 213,409
  4. Step 4: Simplify right side
    100,008.50x = 45,543,401,281
  5. Step 5: Solve for x
    x = 45,543,401,281/100,008.50
  6. Step 6: Final answer
    x = 455,395.30

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.