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Finding the Fourth Proportional to 107.74, 161.70 and 64.46

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Solution

The fourth proportional to 107.74, 161.70 and 64.46 is: 96.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.74 : 161.70 = 64.46 : x
  2. Step 2: Convert to fraction form
    107.74/161.70 = 64.46/x
  3. Step 3: Cross multiply
    107.74x = 161.70 × 64.46
  4. Step 4: Simplify right side
    107.74x = 10,423.18
  5. Step 5: Solve for x
    x = 10,423.18/107.74
  6. Step 6: Final answer
    x = 96.74

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