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Finding the Fourth Proportional to 121,220.66, 181,782.38 and 71,313.86

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Solution

The fourth proportional to 121,220.66, 181,782.38 and 71,313.86 is: 106,942.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,220.66 : 181,782.38 = 71,313.86 : x
  2. Step 2: Convert to fraction form
    121,220.66/181,782.38 = 71,313.86/x
  3. Step 3: Cross multiply
    121,220.66x = 181,782.38 × 71,313.86
  4. Step 4: Simplify right side
    121,220.66x = 12,963,603,197.79
  5. Step 5: Solve for x
    x = 12,963,603,197.79/121,220.66
  6. Step 6: Final answer
    x = 106,942.19

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