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Finding the Fourth Proportional to 70,969.57, 106,454.36 and 28,872.54

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Solution

The fourth proportional to 70,969.57, 106,454.36 and 28,872.54 is: 43,308.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,969.57 : 106,454.36 = 28,872.54 : x
  2. Step 2: Convert to fraction form
    70,969.57/106,454.36 = 28,872.54/x
  3. Step 3: Cross multiply
    70,969.57x = 106,454.36 × 28,872.54
  4. Step 4: Simplify right side
    70,969.57x = 3,073,607,622.91
  5. Step 5: Solve for x
    x = 3,073,607,622.91/70,969.57
  6. Step 6: Final answer
    x = 43,308.81

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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.