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Finding the Third Proportional to 19,489.50 and 40,239

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Solution

The third proportional to 19,489.50 and 40,239 is: 83,079.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,489.50 : 40,239 = 40,239 : x
  2. Step 2: Convert to fraction form
    19,489.50/40,239 = 40,239/x
  3. Step 3: Cross multiply
    19,489.50x = 40,239 × 40,239
  4. Step 4: Simplify right side
    19,489.50x = 1,619,177,121
  5. Step 5: Solve for x
    x = 1,619,177,121/19,489.50
  6. Step 6: Final answer
    x = 83,079.46

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.