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Finding the Fourth Proportional to 69,733, 104,617.26 and 20,485

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Solution

The fourth proportional to 69,733, 104,617.26 and 20,485 is: 30,732.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,733 : 104,617.26 = 20,485 : x
  2. Step 2: Convert to fraction form
    69,733/104,617.26 = 20,485/x
  3. Step 3: Cross multiply
    69,733x = 104,617.26 × 20,485
  4. Step 4: Simplify right side
    69,733x = 2,143,084,571.10
  5. Step 5: Solve for x
    x = 2,143,084,571.10/69,733
  6. Step 6: Final answer
    x = 30,732.72

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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.