Home / 81,809.20-122,659.12-66,033.64

Finding the Fourth Proportional to 81,809.20, 122,659.12 and 66,033.64

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Solution

The fourth proportional to 81,809.20, 122,659.12 and 66,033.64 is: 99,006.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,809.20 : 122,659.12 = 66,033.64 : x
  2. Step 2: Convert to fraction form
    81,809.20/122,659.12 = 66,033.64/x
  3. Step 3: Cross multiply
    81,809.20x = 122,659.12 × 66,033.64
  4. Step 4: Simplify right side
    81,809.20x = 8,099,628,172.80
  5. Step 5: Solve for x
    x = 8,099,628,172.80/81,809.20
  6. Step 6: Final answer
    x = 99,006.32

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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.