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Finding the Fourth Proportional to 81,072.60, 121,609.31 and 36,647.34

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Solution

The fourth proportional to 81,072.60, 121,609.31 and 36,647.34 is: 54,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,072.60 : 121,609.31 = 36,647.34 : x
  2. Step 2: Convert to fraction form
    81,072.60/121,609.31 = 36,647.34/x
  3. Step 3: Cross multiply
    81,072.60x = 121,609.31 × 36,647.34
  4. Step 4: Simplify right side
    81,072.60x = 4,456,657,730.74
  5. Step 5: Solve for x
    x = 4,456,657,730.74/81,072.60
  6. Step 6: Final answer
    x = 54,971.20

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