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Finding the Fourth Proportional to 221,003.76, 331,555.16 and 80,758.80

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Solution

The fourth proportional to 221,003.76, 331,555.16 and 80,758.80 is: 121,156.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,003.76 : 331,555.16 = 80,758.80 : x
  2. Step 2: Convert to fraction form
    221,003.76/331,555.16 = 80,758.80/x
  3. Step 3: Cross multiply
    221,003.76x = 331,555.16 × 80,758.80
  4. Step 4: Simplify right side
    221,003.76x = 26,775,996,855.41
  5. Step 5: Solve for x
    x = 26,775,996,855.41/221,003.76
  6. Step 6: Final answer
    x = 121,156.30

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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.