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Finding the Fourth Proportional to 85,398.37, 128,175.68 and 43,307.51

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Solution

The fourth proportional to 85,398.37, 128,175.68 and 43,307.51 is: 65,000.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,398.37 : 128,175.68 = 43,307.51 : x
  2. Step 2: Convert to fraction form
    85,398.37/128,175.68 = 43,307.51/x
  3. Step 3: Cross multiply
    85,398.37x = 128,175.68 × 43,307.51
  4. Step 4: Simplify right side
    85,398.37x = 5,550,968,685.94
  5. Step 5: Solve for x
    x = 5,550,968,685.94/85,398.37
  6. Step 6: Final answer
    x = 65,000.88

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