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Finding the Fourth Proportional to 221,230.80, 331,481.40 and 127,573.20

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Solution

The fourth proportional to 221,230.80, 331,481.40 and 127,573.20 is: 191,149.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,230.80 : 331,481.40 = 127,573.20 : x
  2. Step 2: Convert to fraction form
    221,230.80/331,481.40 = 127,573.20/x
  3. Step 3: Cross multiply
    221,230.80x = 331,481.40 × 127,573.20
  4. Step 4: Simplify right side
    221,230.80x = 42,288,142,938.48
  5. Step 5: Solve for x
    x = 42,288,142,938.48/221,230.80
  6. Step 6: Final answer
    x = 191,149.44

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1.5x scale

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.