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Finding the Fourth Proportional to 138,939.35, 208,688.01 and 82,888.81

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Solution

The fourth proportional to 138,939.35, 208,688.01 and 82,888.81 is: 124,499.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,939.35 : 208,688.01 = 82,888.81 : x
  2. Step 2: Convert to fraction form
    138,939.35/208,688.01 = 82,888.81/x
  3. Step 3: Cross multiply
    138,939.35x = 208,688.01 × 82,888.81
  4. Step 4: Simplify right side
    138,939.35x = 17,297,900,288.45
  5. Step 5: Solve for x
    x = 17,297,900,288.45/138,939.35
  6. Step 6: Final answer
    x = 124,499.65

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