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Finding the Fourth Proportional to 128,816.48, 177,769.58 and 71,453.93

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Solution

The fourth proportional to 128,816.48, 177,769.58 and 71,453.93 is: 98,607.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,816.48 : 177,769.58 = 71,453.93 : x
  2. Step 2: Convert to fraction form
    128,816.48/177,769.58 = 71,453.93/x
  3. Step 3: Cross multiply
    128,816.48x = 177,769.58 × 71,453.93
  4. Step 4: Simplify right side
    128,816.48x = 12,702,333,879.33
  5. Step 5: Solve for x
    x = 12,702,333,879.33/128,816.48
  6. Step 6: Final answer
    x = 98,607.99

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