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Finding the Fourth Proportional to 72,195.44, 99,626.41 and 39,930.35

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Solution

The fourth proportional to 72,195.44, 99,626.41 and 39,930.35 is: 55,102.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,195.44 : 99,626.41 = 39,930.35 : x
  2. Step 2: Convert to fraction form
    72,195.44/99,626.41 = 39,930.35/x
  3. Step 3: Cross multiply
    72,195.44x = 99,626.41 × 39,930.35
  4. Step 4: Simplify right side
    72,195.44x = 3,978,117,420.54
  5. Step 5: Solve for x
    x = 3,978,117,420.54/72,195.44
  6. Step 6: Final answer
    x = 55,102.06

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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.