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Finding the Fourth Proportional to 100,794.34, 139,104.84 and 55,481.32

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Solution

The fourth proportional to 100,794.34, 139,104.84 and 55,481.32 is: 76,568.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,794.34 : 139,104.84 = 55,481.32 : x
  2. Step 2: Convert to fraction form
    100,794.34/139,104.84 = 55,481.32/x
  3. Step 3: Cross multiply
    100,794.34x = 139,104.84 × 55,481.32
  4. Step 4: Simplify right side
    100,794.34x = 7,717,720,141.59
  5. Step 5: Solve for x
    x = 7,717,720,141.59/100,794.34
  6. Step 6: Final answer
    x = 76,568.98

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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.