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Finding the Fourth Proportional to 125.31, 187.82 and 84.94

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Solution

The fourth proportional to 125.31, 187.82 and 84.94 is: 127.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.31 : 187.82 = 84.94 : x
  2. Step 2: Convert to fraction form
    125.31/187.82 = 84.94/x
  3. Step 3: Cross multiply
    125.31x = 187.82 × 84.94
  4. Step 4: Simplify right side
    125.31x = 15,953.43
  5. Step 5: Solve for x
    x = 15,953.43/125.31
  6. Step 6: Final answer
    x = 127.31

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