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Finding the Fourth Proportional to 281,604.40, 422,406.60 and 81,931.30

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Solution

The fourth proportional to 281,604.40, 422,406.60 and 81,931.30 is: 122,896.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,604.40 : 422,406.60 = 81,931.30 : x
  2. Step 2: Convert to fraction form
    281,604.40/422,406.60 = 81,931.30/x
  3. Step 3: Cross multiply
    281,604.40x = 422,406.60 × 81,931.30
  4. Step 4: Simplify right side
    281,604.40x = 34,608,321,866.58
  5. Step 5: Solve for x
    x = 34,608,321,866.58/281,604.40
  6. Step 6: Final answer
    x = 122,896.95

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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.