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Finding the Fourth Proportional to 92.74, 138.98 and 56.56

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Solution

The fourth proportional to 92.74, 138.98 and 56.56 is: 84.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.74 : 138.98 = 56.56 : x
  2. Step 2: Convert to fraction form
    92.74/138.98 = 56.56/x
  3. Step 3: Cross multiply
    92.74x = 138.98 × 56.56
  4. Step 4: Simplify right side
    92.74x = 7,860.43
  5. Step 5: Solve for x
    x = 7,860.43/92.74
  6. Step 6: Final answer
    x = 84.76

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