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Finding the Fourth Proportional to 138,888.48, 208,358.64 and 45,399.36

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Solution

The fourth proportional to 138,888.48, 208,358.64 and 45,399.36 is: 68,107.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,888.48 : 208,358.64 = 45,399.36 : x
  2. Step 2: Convert to fraction form
    138,888.48/208,358.64 = 45,399.36/x
  3. Step 3: Cross multiply
    138,888.48x = 208,358.64 × 45,399.36
  4. Step 4: Simplify right side
    138,888.48x = 9,459,348,906.47
  5. Step 5: Solve for x
    x = 9,459,348,906.47/138,888.48
  6. Step 6: Final answer
    x = 68,107.51

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