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Finding the Fourth Proportional to 69,243.35, 103,878.99 and 21,865.84

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Solution

The fourth proportional to 69,243.35, 103,878.99 and 21,865.84 is: 32,803.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,243.35 : 103,878.99 = 21,865.84 : x
  2. Step 2: Convert to fraction form
    69,243.35/103,878.99 = 21,865.84/x
  3. Step 3: Cross multiply
    69,243.35x = 103,878.99 × 21,865.84
  4. Step 4: Simplify right side
    69,243.35x = 2,271,400,745.98
  5. Step 5: Solve for x
    x = 2,271,400,745.98/69,243.35
  6. Step 6: Final answer
    x = 32,803.16

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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.