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Finding the Fourth Proportional to 203,980.09, 305,779.90 and 68,950.21

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Solution

The fourth proportional to 203,980.09, 305,779.90 and 68,950.21 is: 103,361.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,980.09 : 305,779.90 = 68,950.21 : x
  2. Step 2: Convert to fraction form
    203,980.09/305,779.90 = 68,950.21/x
  3. Step 3: Cross multiply
    203,980.09x = 305,779.90 × 68,950.21
  4. Step 4: Simplify right side
    203,980.09x = 21,083,586,789.88
  5. Step 5: Solve for x
    x = 21,083,586,789.88/203,980.09
  6. Step 6: Final answer
    x = 103,361.00

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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.