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Finding the Fourth Proportional to 128,744.73, 177,657.93 and 72,145.17

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Solution

The fourth proportional to 128,744.73, 177,657.93 and 72,145.17 is: 99,554.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,744.73 : 177,657.93 = 72,145.17 : x
  2. Step 2: Convert to fraction form
    128,744.73/177,657.93 = 72,145.17/x
  3. Step 3: Cross multiply
    128,744.73x = 177,657.93 × 72,145.17
  4. Step 4: Simplify right side
    128,744.73x = 12,817,161,561.70
  5. Step 5: Solve for x
    x = 12,817,161,561.70/128,744.73
  6. Step 6: Final answer
    x = 99,554.84

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