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Finding the Third Proportional to 100,939.50 and 212,341.50

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Solution

The third proportional to 100,939.50 and 212,341.50 is: 446,692.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,939.50 : 212,341.50 = 212,341.50 : x
  2. Step 2: Convert to fraction form
    100,939.50/212,341.50 = 212,341.50/x
  3. Step 3: Cross multiply
    100,939.50x = 212,341.50 × 212,341.50
  4. Step 4: Simplify right side
    100,939.50x = 45,088,912,622.25
  5. Step 5: Solve for x
    x = 45,088,912,622.25/100,939.50
  6. Step 6: Final answer
    x = 446,692.45

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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.