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Finding the Third Proportional to 102,688.50 and 220,655

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Solution

The third proportional to 102,688.50 and 220,655 is: 474,139.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,688.50 : 220,655 = 220,655 : x
  2. Step 2: Convert to fraction form
    102,688.50/220,655 = 220,655/x
  3. Step 3: Cross multiply
    102,688.50x = 220,655 × 220,655
  4. Step 4: Simplify right side
    102,688.50x = 48,688,629,025
  5. Step 5: Solve for x
    x = 48,688,629,025/102,688.50
  6. Step 6: Final answer
    x = 474,139.06

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.