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Finding the Fourth Proportional to 100,794.36, 139,102.72 and 66,743.58

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Solution

The fourth proportional to 100,794.36, 139,102.72 and 66,743.58 is: 92,110.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,794.36 : 139,102.72 = 66,743.58 : x
  2. Step 2: Convert to fraction form
    100,794.36/139,102.72 = 66,743.58/x
  3. Step 3: Cross multiply
    100,794.36x = 139,102.72 × 66,743.58
  4. Step 4: Simplify right side
    100,794.36x = 9,284,213,520.54
  5. Step 5: Solve for x
    x = 9,284,213,520.54/100,794.36
  6. Step 6: Final answer
    x = 92,110.45

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1.5x scale

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.