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Finding the Fourth Proportional to 78,878.85, 118,241.73 and 31,480.26

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Solution

The fourth proportional to 78,878.85, 118,241.73 and 31,480.26 is: 47,189.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,878.85 : 118,241.73 = 31,480.26 : x
  2. Step 2: Convert to fraction form
    78,878.85/118,241.73 = 31,480.26/x
  3. Step 3: Cross multiply
    78,878.85x = 118,241.73 × 31,480.26
  4. Step 4: Simplify right side
    78,878.85x = 3,722,280,403.25
  5. Step 5: Solve for x
    x = 3,722,280,403.25/78,878.85
  6. Step 6: Final answer
    x = 47,189.84

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