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Finding the Fourth Proportional to 138,556.20, 207,542.70 and 115,228.20

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Solution

The fourth proportional to 138,556.20, 207,542.70 and 115,228.20 is: 172,599.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,556.20 : 207,542.70 = 115,228.20 : x
  2. Step 2: Convert to fraction form
    138,556.20/207,542.70 = 115,228.20/x
  3. Step 3: Cross multiply
    138,556.20x = 207,542.70 × 115,228.20
  4. Step 4: Simplify right side
    138,556.20x = 23,914,771,744.14
  5. Step 5: Solve for x
    x = 23,914,771,744.14/138,556.20
  6. Step 6: Final answer
    x = 172,599.80

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