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Finding the Fourth Proportional to 69,800.45, 104,699.31 and 19,880.87

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Solution

The fourth proportional to 69,800.45, 104,699.31 and 19,880.87 is: 29,820.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,800.45 : 104,699.31 = 19,880.87 : x
  2. Step 2: Convert to fraction form
    69,800.45/104,699.31 = 19,880.87/x
  3. Step 3: Cross multiply
    69,800.45x = 104,699.31 × 19,880.87
  4. Step 4: Simplify right side
    69,800.45x = 2,081,512,847.70
  5. Step 5: Solve for x
    x = 2,081,512,847.70/69,800.45
  6. Step 6: Final answer
    x = 29,820.91

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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.