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Finding the Fourth Proportional to 70,872.08, 106,311.99 and 28,745.90

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Solution

The fourth proportional to 70,872.08, 106,311.99 and 28,745.90 is: 43,120.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,872.08 : 106,311.99 = 28,745.90 : x
  2. Step 2: Convert to fraction form
    70,872.08/106,311.99 = 28,745.90/x
  3. Step 3: Cross multiply
    70,872.08x = 106,311.99 × 28,745.90
  4. Step 4: Simplify right side
    70,872.08x = 3,056,033,833.34
  5. Step 5: Solve for x
    x = 3,056,033,833.34/70,872.08
  6. Step 6: Final answer
    x = 43,120.42

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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.