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Finding the Fourth Proportional to 99,170.44, 136,912.44 and 75,255.28

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Solution

The fourth proportional to 99,170.44, 136,912.44 and 75,255.28 is: 103,895.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,170.44 : 136,912.44 = 75,255.28 : x
  2. Step 2: Convert to fraction form
    99,170.44/136,912.44 = 75,255.28/x
  3. Step 3: Cross multiply
    99,170.44x = 136,912.44 × 75,255.28
  4. Step 4: Simplify right side
    99,170.44x = 10,303,384,007.68
  5. Step 5: Solve for x
    x = 10,303,384,007.68/99,170.44
  6. Step 6: Final answer
    x = 103,895.72

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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.