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Finding the Fourth Proportional to 203,989.06, 305,974.25 and 70,879.74

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Solution

The fourth proportional to 203,989.06, 305,974.25 and 70,879.74 is: 106,316.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,989.06 : 305,974.25 = 70,879.74 : x
  2. Step 2: Convert to fraction form
    203,989.06/305,974.25 = 70,879.74/x
  3. Step 3: Cross multiply
    203,989.06x = 305,974.25 × 70,879.74
  4. Step 4: Simplify right side
    203,989.06x = 21,687,373,402.43
  5. Step 5: Solve for x
    x = 21,687,373,402.43/203,989.06
  6. Step 6: Final answer
    x = 106,316.36

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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.