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Finding the Fourth Proportional to 128,767.80, 193,151.70 and 121,510.20

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Solution

The fourth proportional to 128,767.80, 193,151.70 and 121,510.20 is: 182,265.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,767.80 : 193,151.70 = 121,510.20 : x
  2. Step 2: Convert to fraction form
    128,767.80/193,151.70 = 121,510.20/x
  3. Step 3: Cross multiply
    128,767.80x = 193,151.70 × 121,510.20
  4. Step 4: Simplify right side
    128,767.80x = 23,469,901,697.34
  5. Step 5: Solve for x
    x = 23,469,901,697.34/128,767.80
  6. Step 6: Final answer
    x = 182,265.30

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