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Finding the Fourth Proportional to 69,998.56, 104,976.32 and 20,065.28

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Solution

The fourth proportional to 69,998.56, 104,976.32 and 20,065.28 is: 30,091.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,998.56 : 104,976.32 = 20,065.28 : x
  2. Step 2: Convert to fraction form
    69,998.56/104,976.32 = 20,065.28/x
  3. Step 3: Cross multiply
    69,998.56x = 104,976.32 × 20,065.28
  4. Step 4: Simplify right side
    69,998.56x = 2,106,379,254.17
  5. Step 5: Solve for x
    x = 2,106,379,254.17/69,998.56
  6. Step 6: Final answer
    x = 30,091.75

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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.