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Finding the Fourth Proportional to 221,090.80, 331,441.80 and 132,379.60

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Solution

The fourth proportional to 221,090.80, 331,441.80 and 132,379.60 is: 198,453.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,090.80 : 331,441.80 = 132,379.60 : x
  2. Step 2: Convert to fraction form
    221,090.80/331,441.80 = 132,379.60/x
  3. Step 3: Cross multiply
    221,090.80x = 331,441.80 × 132,379.60
  4. Step 4: Simplify right side
    221,090.80x = 43,876,132,907.28
  5. Step 5: Solve for x
    x = 43,876,132,907.28/221,090.80
  6. Step 6: Final answer
    x = 198,453.00

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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.