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Finding the Fourth Proportional to 81,911.01, 122,603.56 and 43,907.44

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Solution

The fourth proportional to 81,911.01, 122,603.56 and 43,907.44 is: 65,720.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,911.01 : 122,603.56 = 43,907.44 : x
  2. Step 2: Convert to fraction form
    81,911.01/122,603.56 = 43,907.44/x
  3. Step 3: Cross multiply
    81,911.01x = 122,603.56 × 43,907.44
  4. Step 4: Simplify right side
    81,911.01x = 5,383,208,798.15
  5. Step 5: Solve for x
    x = 5,383,208,798.15/81,911.01
  6. Step 6: Final answer
    x = 65,720.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.