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Finding the Fourth Proportional to 128,515.55, 177,232.93 and 88,158.11

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Solution

The fourth proportional to 128,515.55, 177,232.93 and 88,158.11 is: 121,576.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,515.55 : 177,232.93 = 88,158.11 : x
  2. Step 2: Convert to fraction form
    128,515.55/177,232.93 = 88,158.11/x
  3. Step 3: Cross multiply
    128,515.55x = 177,232.93 × 88,158.11
  4. Step 4: Simplify right side
    128,515.55x = 15,624,519,032.00
  5. Step 5: Solve for x
    x = 15,624,519,032.00/128,515.55
  6. Step 6: Final answer
    x = 121,576.88

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