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Finding the Fourth Proportional to 123,395.10, 170,198.64 and 85,169.98

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Solution

The fourth proportional to 123,395.10, 170,198.64 and 85,169.98 is: 117,474.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,395.10 : 170,198.64 = 85,169.98 : x
  2. Step 2: Convert to fraction form
    123,395.10/170,198.64 = 85,169.98/x
  3. Step 3: Cross multiply
    123,395.10x = 170,198.64 × 85,169.98
  4. Step 4: Simplify right side
    123,395.10x = 14,495,814,764.83
  5. Step 5: Solve for x
    x = 14,495,814,764.83/123,395.10
  6. Step 6: Final answer
    x = 117,474.80

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