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Finding the Fourth Proportional to 69,185.88, 103,794.35 and 21,158.69

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Solution

The fourth proportional to 69,185.88, 103,794.35 and 21,158.69 is: 31,742.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,185.88 : 103,794.35 = 21,158.69 : x
  2. Step 2: Convert to fraction form
    69,185.88/103,794.35 = 21,158.69/x
  3. Step 3: Cross multiply
    69,185.88x = 103,794.35 × 21,158.69
  4. Step 4: Simplify right side
    69,185.88x = 2,196,151,850.64
  5. Step 5: Solve for x
    x = 2,196,151,850.64/69,185.88
  6. Step 6: Final answer
    x = 31,742.78

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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.