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Finding the Fourth Proportional to 121,012.10, 181,554.60 and 86,020.10

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Solution

The fourth proportional to 121,012.10, 181,554.60 and 86,020.10 is: 129,056.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,012.10 : 181,554.60 = 86,020.10 : x
  2. Step 2: Convert to fraction form
    121,012.10/181,554.60 = 86,020.10/x
  3. Step 3: Cross multiply
    121,012.10x = 181,554.60 × 86,020.10
  4. Step 4: Simplify right side
    121,012.10x = 15,617,344,847.46
  5. Step 5: Solve for x
    x = 15,617,344,847.46/121,012.10
  6. Step 6: Final answer
    x = 129,056.06

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