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Finding the Third Proportional to 81,823.50 and 128,445.75

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Solution

The third proportional to 81,823.50 and 128,445.75 is: 201,632.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,823.50 : 128,445.75 = 128,445.75 : x
  2. Step 2: Convert to fraction form
    81,823.50/128,445.75 = 128,445.75/x
  3. Step 3: Cross multiply
    81,823.50x = 128,445.75 × 128,445.75
  4. Step 4: Simplify right side
    81,823.50x = 16,498,310,693.06
  5. Step 5: Solve for x
    x = 16,498,310,693.06/81,823.50
  6. Step 6: Final answer
    x = 201,632.91

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.