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Finding the Fourth Proportional to 138,154.20, 206,960.14 and 71,637.81

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Solution

The fourth proportional to 138,154.20, 206,960.14 and 71,637.81 is: 107,316.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154.20 : 206,960.14 = 71,637.81 : x
  2. Step 2: Convert to fraction form
    138,154.20/206,960.14 = 71,637.81/x
  3. Step 3: Cross multiply
    138,154.20x = 206,960.14 × 71,637.81
  4. Step 4: Simplify right side
    138,154.20x = 14,826,171,186.89
  5. Step 5: Solve for x
    x = 14,826,171,186.89/138,154.20
  6. Step 6: Final answer
    x = 107,316.11

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