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Finding the Fourth Proportional to 220,844.40, 331,266.60 and 121,311.60

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Solution

The fourth proportional to 220,844.40, 331,266.60 and 121,311.60 is: 181,967.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,844.40 : 331,266.60 = 121,311.60 : x
  2. Step 2: Convert to fraction form
    220,844.40/331,266.60 = 121,311.60/x
  3. Step 3: Cross multiply
    220,844.40x = 331,266.60 × 121,311.60
  4. Step 4: Simplify right side
    220,844.40x = 40,186,481,272.56
  5. Step 5: Solve for x
    x = 40,186,481,272.56/220,844.40
  6. Step 6: Final answer
    x = 181,967.40

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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.