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Finding the Fourth Proportional to 69,418.17, 104,145.69 and 36,128.39

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Solution

The fourth proportional to 69,418.17, 104,145.69 and 36,128.39 is: 54,202.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,418.17 : 104,145.69 = 36,128.39 : x
  2. Step 2: Convert to fraction form
    69,418.17/104,145.69 = 36,128.39/x
  3. Step 3: Cross multiply
    69,418.17x = 104,145.69 × 36,128.39
  4. Step 4: Simplify right side
    69,418.17x = 3,762,615,584.41
  5. Step 5: Solve for x
    x = 3,762,615,584.41/69,418.17
  6. Step 6: Final answer
    x = 54,202.17

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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.