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Finding the Third Proportional to 79,639.50 and 120,075

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Solution

The third proportional to 79,639.50 and 120,075 is: 181,040.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,639.50 : 120,075 = 120,075 : x
  2. Step 2: Convert to fraction form
    79,639.50/120,075 = 120,075/x
  3. Step 3: Cross multiply
    79,639.50x = 120,075 × 120,075
  4. Step 4: Simplify right side
    79,639.50x = 14,418,005,625
  5. Step 5: Solve for x
    x = 14,418,005,625/79,639.50
  6. Step 6: Final answer
    x = 181,040.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.