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Finding the Fourth Proportional to 172,807.75, 259,313.69 and 72,961.48

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Solution

The fourth proportional to 172,807.75, 259,313.69 and 72,961.48 is: 109,485.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,807.75 : 259,313.69 = 72,961.48 : x
  2. Step 2: Convert to fraction form
    172,807.75/259,313.69 = 72,961.48/x
  3. Step 3: Cross multiply
    172,807.75x = 259,313.69 × 72,961.48
  4. Step 4: Simplify right side
    172,807.75x = 18,919,910,606.66
  5. Step 5: Solve for x
    x = 18,919,910,606.66/172,807.75
  6. Step 6: Final answer
    x = 109,485.31

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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.