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Finding the Fourth Proportional to 221,858.40, 332,919.36 and 81,715.36

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Solution

The fourth proportional to 221,858.40, 332,919.36 and 81,715.36 is: 122,621.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,858.40 : 332,919.36 = 81,715.36 : x
  2. Step 2: Convert to fraction form
    221,858.40/332,919.36 = 81,715.36/x
  3. Step 3: Cross multiply
    221,858.40x = 332,919.36 × 81,715.36
  4. Step 4: Simplify right side
    221,858.40x = 27,204,625,353.37
  5. Step 5: Solve for x
    x = 27,204,625,353.37/221,858.40
  6. Step 6: Final answer
    x = 122,621.57

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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.