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Finding the Fourth Proportional to 207,999.90, 311,717.16 and 87,957.09

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Solution

The fourth proportional to 207,999.90, 311,717.16 and 87,957.09 is: 131,816.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,999.90 : 311,717.16 = 87,957.09 : x
  2. Step 2: Convert to fraction form
    207,999.90/311,717.16 = 87,957.09/x
  3. Step 3: Cross multiply
    207,999.90x = 311,717.16 × 87,957.09
  4. Step 4: Simplify right side
    207,999.90x = 27,417,734,296.66
  5. Step 5: Solve for x
    x = 27,417,734,296.66/207,999.90
  6. Step 6: Final answer
    x = 131,816.09

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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.