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Finding the Fourth Proportional to 191.94, 287.98 and 83.74

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Solution

The fourth proportional to 191.94, 287.98 and 83.74 is: 125.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.94 : 287.98 = 83.74 : x
  2. Step 2: Convert to fraction form
    191.94/287.98 = 83.74/x
  3. Step 3: Cross multiply
    191.94x = 287.98 × 83.74
  4. Step 4: Simplify right side
    191.94x = 24,115.45
  5. Step 5: Solve for x
    x = 24,115.45/191.94
  6. Step 6: Final answer
    x = 125.64

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