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Finding the Fourth Proportional to 128,455.50, 177,208.71 and 83,148.06

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Solution

The fourth proportional to 128,455.50, 177,208.71 and 83,148.06 is: 114,705.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,455.50 : 177,208.71 = 83,148.06 : x
  2. Step 2: Convert to fraction form
    128,455.50/177,208.71 = 83,148.06/x
  3. Step 3: Cross multiply
    128,455.50x = 177,208.71 × 83,148.06
  4. Step 4: Simplify right side
    128,455.50x = 14,734,560,451.60
  5. Step 5: Solve for x
    x = 14,734,560,451.60/128,455.50
  6. Step 6: Final answer
    x = 114,705.56

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