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Finding the Fourth Proportional to 221,090.80, 331,765.80 and 80,863.60

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Solution

The fourth proportional to 221,090.80, 331,765.80 and 80,863.60 is: 121,342.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,090.80 : 331,765.80 = 80,863.60 : x
  2. Step 2: Convert to fraction form
    221,090.80/331,765.80 = 80,863.60/x
  3. Step 3: Cross multiply
    221,090.80x = 331,765.80 × 80,863.60
  4. Step 4: Simplify right side
    221,090.80x = 26,827,776,944.88
  5. Step 5: Solve for x
    x = 26,827,776,944.88/221,090.80
  6. Step 6: Final answer
    x = 121,342.80

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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.