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Finding the Fourth Proportional to 123,118.16, 169,903.64 and 72,139.96

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Solution

The fourth proportional to 123,118.16, 169,903.64 and 72,139.96 is: 99,553.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,118.16 : 169,903.64 = 72,139.96 : x
  2. Step 2: Convert to fraction form
    123,118.16/169,903.64 = 72,139.96/x
  3. Step 3: Cross multiply
    123,118.16x = 169,903.64 × 72,139.96
  4. Step 4: Simplify right side
    123,118.16x = 12,256,840,583.24
  5. Step 5: Solve for x
    x = 12,256,840,583.24/123,118.16
  6. Step 6: Final answer
    x = 99,553.47

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