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Finding the Fourth Proportional to 69,947.18, 104,889.90 and 20,015.91

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Solution

The fourth proportional to 69,947.18, 104,889.90 and 20,015.91 is: 30,015.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,947.18 : 104,889.90 = 20,015.91 : x
  2. Step 2: Convert to fraction form
    69,947.18/104,889.90 = 20,015.91/x
  3. Step 3: Cross multiply
    69,947.18x = 104,889.90 × 20,015.91
  4. Step 4: Simplify right side
    69,947.18x = 2,099,466,873.37
  5. Step 5: Solve for x
    x = 2,099,466,873.37/69,947.18
  6. Step 6: Final answer
    x = 30,015.03

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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.