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Finding the Fourth Proportional to 203,579.54, 305,369.33 and 139,474.47

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Solution

The fourth proportional to 203,579.54, 305,369.33 and 139,474.47 is: 209,211.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,579.54 : 305,369.33 = 139,474.47 : x
  2. Step 2: Convert to fraction form
    203,579.54/305,369.33 = 139,474.47/x
  3. Step 3: Cross multiply
    203,579.54x = 305,369.33 × 139,474.47
  4. Step 4: Simplify right side
    203,579.54x = 42,591,225,903.77
  5. Step 5: Solve for x
    x = 42,591,225,903.77/203,579.54
  6. Step 6: Final answer
    x = 209,211.72

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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.