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Finding the Fourth Proportional to 131.76, 197.67 and 40.47

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Solution

The fourth proportional to 131.76, 197.67 and 40.47 is: 60.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.76 : 197.67 = 40.47 : x
  2. Step 2: Convert to fraction form
    131.76/197.67 = 40.47/x
  3. Step 3: Cross multiply
    131.76x = 197.67 × 40.47
  4. Step 4: Simplify right side
    131.76x = 7,999.70
  5. Step 5: Solve for x
    x = 7,999.70/131.76
  6. Step 6: Final answer
    x = 60.71

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