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Finding the Fourth Proportional to 100,289.07, 138,461.94 and 64,541.34

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Solution

The fourth proportional to 100,289.07, 138,461.94 and 64,541.34 is: 89,107.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,289.07 : 138,461.94 = 64,541.34 : x
  2. Step 2: Convert to fraction form
    100,289.07/138,461.94 = 64,541.34/x
  3. Step 3: Cross multiply
    100,289.07x = 138,461.94 × 64,541.34
  4. Step 4: Simplify right side
    100,289.07x = 8,936,519,146.60
  5. Step 5: Solve for x
    x = 8,936,519,146.60/100,289.07
  6. Step 6: Final answer
    x = 89,107.61

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