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Finding the Fourth Proportional to 86,768.40, 130,152.60 and 85,846.80

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Solution

The fourth proportional to 86,768.40, 130,152.60 and 85,846.80 is: 128,770.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,768.40 : 130,152.60 = 85,846.80 : x
  2. Step 2: Convert to fraction form
    86,768.40/130,152.60 = 85,846.80/x
  3. Step 3: Cross multiply
    86,768.40x = 130,152.60 × 85,846.80
  4. Step 4: Simplify right side
    86,768.40x = 11,173,184,221.68
  5. Step 5: Solve for x
    x = 11,173,184,221.68/86,768.40
  6. Step 6: Final answer
    x = 128,770.20

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