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Finding the Fourth Proportional to 69,940.54, 104,954.56 and 28,387.54

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Solution

The fourth proportional to 69,940.54, 104,954.56 and 28,387.54 is: 42,599.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,940.54 : 104,954.56 = 28,387.54 : x
  2. Step 2: Convert to fraction form
    69,940.54/104,954.56 = 28,387.54/x
  3. Step 3: Cross multiply
    69,940.54x = 104,954.56 × 28,387.54
  4. Step 4: Simplify right side
    69,940.54x = 2,979,401,770.18
  5. Step 5: Solve for x
    x = 2,979,401,770.18/69,940.54
  6. Step 6: Final answer
    x = 42,599.07

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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.