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Finding the Third Proportional to 81,225 and 121,837.50

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Solution

The third proportional to 81,225 and 121,837.50 is: 182,756.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,225 : 121,837.50 = 121,837.50 : x
  2. Step 2: Convert to fraction form
    81,225/121,837.50 = 121,837.50/x
  3. Step 3: Cross multiply
    81,225x = 121,837.50 × 121,837.50
  4. Step 4: Simplify right side
    81,225x = 14,844,376,406.25
  5. Step 5: Solve for x
    x = 14,844,376,406.25/81,225
  6. Step 6: Final answer
    x = 182,756.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.