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Finding the Fourth Proportional to 221,187.20, 331,780.80 and 73,443.20

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Solution

The fourth proportional to 221,187.20, 331,780.80 and 73,443.20 is: 110,164.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,187.20 : 331,780.80 = 73,443.20 : x
  2. Step 2: Convert to fraction form
    221,187.20/331,780.80 = 73,443.20/x
  3. Step 3: Cross multiply
    221,187.20x = 331,780.80 × 73,443.20
  4. Step 4: Simplify right side
    221,187.20x = 24,367,043,650.56
  5. Step 5: Solve for x
    x = 24,367,043,650.56/221,187.20
  6. Step 6: Final answer
    x = 110,164.80

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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.