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Finding the Fourth Proportional to 136,806.76, 188,796.44 and 85,821.56

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Solution

The fourth proportional to 136,806.76, 188,796.44 and 85,821.56 is: 118,435.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,806.76 : 188,796.44 = 85,821.56 : x
  2. Step 2: Convert to fraction form
    136,806.76/188,796.44 = 85,821.56/x
  3. Step 3: Cross multiply
    136,806.76x = 188,796.44 × 85,821.56
  4. Step 4: Simplify right side
    136,806.76x = 16,202,805,003.25
  5. Step 5: Solve for x
    x = 16,202,805,003.25/136,806.76
  6. Step 6: Final answer
    x = 118,435.70

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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.