Home / 208,076.43-312,161.10-81,728.85

Finding the Fourth Proportional to 208,076.43, 312,161.10 and 81,728.85

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Solution

The fourth proportional to 208,076.43, 312,161.10 and 81,728.85 is: 122,611.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,076.43 : 312,161.10 = 81,728.85 : x
  2. Step 2: Convert to fraction form
    208,076.43/312,161.10 = 81,728.85/x
  3. Step 3: Cross multiply
    208,076.43x = 312,161.10 × 81,728.85
  4. Step 4: Simplify right side
    208,076.43x = 25,512,567,717.74
  5. Step 5: Solve for x
    x = 25,512,567,717.74/208,076.43
  6. Step 6: Final answer
    x = 122,611.52

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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.