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Finding the Fourth Proportional to 85,300.40, 128,047.80 and 50,259.80

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Solution

The fourth proportional to 85,300.40, 128,047.80 and 50,259.80 is: 75,446.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,300.40 : 128,047.80 = 50,259.80 : x
  2. Step 2: Convert to fraction form
    85,300.40/128,047.80 = 50,259.80/x
  3. Step 3: Cross multiply
    85,300.40x = 128,047.80 × 50,259.80
  4. Step 4: Simplify right side
    85,300.40x = 6,435,656,818.44
  5. Step 5: Solve for x
    x = 6,435,656,818.44/85,300.40
  6. Step 6: Final answer
    x = 75,446.97

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