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Finding the Fourth Proportional to 221,202, 331,804.22 and 54,990

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Solution

The fourth proportional to 221,202, 331,804.22 and 54,990 is: 82,485.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,202 : 331,804.22 = 54,990 : x
  2. Step 2: Convert to fraction form
    221,202/331,804.22 = 54,990/x
  3. Step 3: Cross multiply
    221,202x = 331,804.22 × 54,990
  4. Step 4: Simplify right side
    221,202x = 18,245,913,782.85
  5. Step 5: Solve for x
    x = 18,245,913,782.85/221,202
  6. Step 6: Final answer
    x = 82,485.30

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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.