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Finding the Fourth Proportional to 203,980.67, 305,780.76 and 68,950.79

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Solution

The fourth proportional to 203,980.67, 305,780.76 and 68,950.79 is: 103,361.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,980.67 : 305,780.76 = 68,950.79 : x
  2. Step 2: Convert to fraction form
    203,980.67/305,780.76 = 68,950.79/x
  3. Step 3: Cross multiply
    203,980.67x = 305,780.76 × 68,950.79
  4. Step 4: Simplify right side
    203,980.67x = 21,083,823,439.90
  5. Step 5: Solve for x
    x = 21,083,823,439.90/203,980.67
  6. Step 6: Final answer
    x = 103,361.87

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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.