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Finding the Fourth Proportional to 100,794.60, 139,103.06 and 66,743.82

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Solution

The fourth proportional to 100,794.60, 139,103.06 and 66,743.82 is: 92,110.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,794.60 : 139,103.06 = 66,743.82 : x
  2. Step 2: Convert to fraction form
    100,794.60/139,103.06 = 66,743.82/x
  3. Step 3: Cross multiply
    100,794.60x = 139,103.06 × 66,743.82
  4. Step 4: Simplify right side
    100,794.60x = 9,284,269,264.37
  5. Step 5: Solve for x
    x = 9,284,269,264.37/100,794.60
  6. Step 6: Final answer
    x = 92,110.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.