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Finding the Fourth Proportional to 69,785.30, 104,679.16 and 19,866.68

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Solution

The fourth proportional to 69,785.30, 104,679.16 and 19,866.68 is: 29,800.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,785.30 : 104,679.16 = 19,866.68 : x
  2. Step 2: Convert to fraction form
    69,785.30/104,679.16 = 19,866.68/x
  3. Step 3: Cross multiply
    69,785.30x = 104,679.16 × 19,866.68
  4. Step 4: Simplify right side
    69,785.30x = 2,079,627,374.39
  5. Step 5: Solve for x
    x = 2,079,627,374.39/69,785.30
  6. Step 6: Final answer
    x = 29,800.36

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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.