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Finding the Third Proportional to 120,507.75 and 259,645.50

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Solution

The third proportional to 120,507.75 and 259,645.50 is: 559,431.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,507.75 : 259,645.50 = 259,645.50 : x
  2. Step 2: Convert to fraction form
    120,507.75/259,645.50 = 259,645.50/x
  3. Step 3: Cross multiply
    120,507.75x = 259,645.50 × 259,645.50
  4. Step 4: Simplify right side
    120,507.75x = 67,415,785,670.25
  5. Step 5: Solve for x
    x = 67,415,785,670.25/120,507.75
  6. Step 6: Final answer
    x = 559,431.12

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.