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Finding the Third Proportional to 142,630.25 and 309,043.75

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Solution

The third proportional to 142,630.25 and 309,043.75 is: 669,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,630.25 : 309,043.75 = 309,043.75 : x
  2. Step 2: Convert to fraction form
    142,630.25/309,043.75 = 309,043.75/x
  3. Step 3: Cross multiply
    142,630.25x = 309,043.75 × 309,043.75
  4. Step 4: Simplify right side
    142,630.25x = 95,508,039,414.06
  5. Step 5: Solve for x
    x = 95,508,039,414.06/142,630.25
  6. Step 6: Final answer
    x = 669,619.80

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.