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Finding the Fourth Proportional to 221,029.20, 331,716.60 and 102,715.20

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Solution

The fourth proportional to 221,029.20, 331,716.60 and 102,715.20 is: 154,153.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,029.20 : 331,716.60 = 102,715.20 : x
  2. Step 2: Convert to fraction form
    221,029.20/331,716.60 = 102,715.20/x
  3. Step 3: Cross multiply
    221,029.20x = 331,716.60 × 102,715.20
  4. Step 4: Simplify right side
    221,029.20x = 34,072,336,912.32
  5. Step 5: Solve for x
    x = 34,072,336,912.32/221,029.20
  6. Step 6: Final answer
    x = 154,153.10

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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.