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Finding the Fourth Proportional to 69,801.45, 104,700.81 and 19,881.87

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Solution

The fourth proportional to 69,801.45, 104,700.81 and 19,881.87 is: 29,822.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,801.45 : 104,700.81 = 19,881.87 : x
  2. Step 2: Convert to fraction form
    69,801.45/104,700.81 = 19,881.87/x
  3. Step 3: Cross multiply
    69,801.45x = 104,700.81 × 19,881.87
  4. Step 4: Simplify right side
    69,801.45x = 2,081,647,893.31
  5. Step 5: Solve for x
    x = 2,081,647,893.31/69,801.45
  6. Step 6: Final answer
    x = 29,822.42

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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.