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Finding the Fourth Proportional to 69,775.88, 104,677.65 and 19,857.94

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Solution

The fourth proportional to 69,775.88, 104,677.65 and 19,857.94 is: 29,790.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,775.88 : 104,677.65 = 19,857.94 : x
  2. Step 2: Convert to fraction form
    69,775.88/104,677.65 = 19,857.94/x
  3. Step 3: Cross multiply
    69,775.88x = 104,677.65 × 19,857.94
  4. Step 4: Simplify right side
    69,775.88x = 2,078,682,820.16
  5. Step 5: Solve for x
    x = 2,078,682,820.16/69,775.88
  6. Step 6: Final answer
    x = 29,790.85

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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.