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Finding the Fourth Proportional to 123,506.40, 170,471.40 and 85,272.24

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Solution

The fourth proportional to 123,506.40, 170,471.40 and 85,272.24 is: 117,698.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,506.40 : 170,471.40 = 85,272.24 : x
  2. Step 2: Convert to fraction form
    123,506.40/170,471.40 = 85,272.24/x
  3. Step 3: Cross multiply
    123,506.40x = 170,471.40 × 85,272.24
  4. Step 4: Simplify right side
    123,506.40x = 14,536,478,133.94
  5. Step 5: Solve for x
    x = 14,536,478,133.94/123,506.40
  6. Step 6: Final answer
    x = 117,698.18

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