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Finding the Fourth Proportional to 75.31, 112.99 and 36.81

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Solution

The fourth proportional to 75.31, 112.99 and 36.81 is: 55.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.31 : 112.99 = 36.81 : x
  2. Step 2: Convert to fraction form
    75.31/112.99 = 36.81/x
  3. Step 3: Cross multiply
    75.31x = 112.99 × 36.81
  4. Step 4: Simplify right side
    75.31x = 4,159.35
  5. Step 5: Solve for x
    x = 4,159.35/75.31
  6. Step 6: Final answer
    x = 55.23

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