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Finding the Fourth Proportional to 137.91, 206.82 and 64.74

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Solution

The fourth proportional to 137.91, 206.82 and 64.74 is: 97.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.91 : 206.82 = 64.74 : x
  2. Step 2: Convert to fraction form
    137.91/206.82 = 64.74/x
  3. Step 3: Cross multiply
    137.91x = 206.82 × 64.74
  4. Step 4: Simplify right side
    137.91x = 13,389.53
  5. Step 5: Solve for x
    x = 13,389.53/137.91
  6. Step 6: Final answer
    x = 97.09

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