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Finding the Fourth Proportional to 120,305.17, 165,907.56 and 89,745.76

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Solution

The fourth proportional to 120,305.17, 165,907.56 and 89,745.76 is: 123,764.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,305.17 : 165,907.56 = 89,745.76 : x
  2. Step 2: Convert to fraction form
    120,305.17/165,907.56 = 89,745.76/x
  3. Step 3: Cross multiply
    120,305.17x = 165,907.56 × 89,745.76
  4. Step 4: Simplify right side
    120,305.17x = 14,889,500,061.95
  5. Step 5: Solve for x
    x = 14,889,500,061.95/120,305.17
  6. Step 6: Final answer
    x = 123,764.42

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