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Finding the Third Proportional to 81,211.50 and 124,989

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Solution

The third proportional to 81,211.50 and 124,989 is: 192,365.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,211.50 : 124,989 = 124,989 : x
  2. Step 2: Convert to fraction form
    81,211.50/124,989 = 124,989/x
  3. Step 3: Cross multiply
    81,211.50x = 124,989 × 124,989
  4. Step 4: Simplify right side
    81,211.50x = 15,622,250,121
  5. Step 5: Solve for x
    x = 15,622,250,121/81,211.50
  6. Step 6: Final answer
    x = 192,365.00

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.