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Finding the Fourth Proportional to 100,793.85, 139,102.02 and 66,743.07

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Solution

The fourth proportional to 100,793.85, 139,102.02 and 66,743.07 is: 92,109.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,793.85 : 139,102.02 = 66,743.07 : x
  2. Step 2: Convert to fraction form
    100,793.85/139,102.02 = 66,743.07/x
  3. Step 3: Cross multiply
    100,793.85x = 139,102.02 × 66,743.07
  4. Step 4: Simplify right side
    100,793.85x = 9,284,095,858.00
  5. Step 5: Solve for x
    x = 9,284,095,858.00/100,793.85
  6. Step 6: Final answer
    x = 92,109.75

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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.