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Finding the Third Proportional to 39,306.75 and 81,428.25

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Solution

The third proportional to 39,306.75 and 81,428.25 is: 168,687.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,306.75 : 81,428.25 = 81,428.25 : x
  2. Step 2: Convert to fraction form
    39,306.75/81,428.25 = 81,428.25/x
  3. Step 3: Cross multiply
    39,306.75x = 81,428.25 × 81,428.25
  4. Step 4: Simplify right side
    39,306.75x = 6,630,559,898.06
  5. Step 5: Solve for x
    x = 6,630,559,898.06/39,306.75
  6. Step 6: Final answer
    x = 168,687.56

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.