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Finding the Fourth Proportional to 93.76, 140.64 and 45.70

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Solution

The fourth proportional to 93.76, 140.64 and 45.70 is: 68.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.76 : 140.64 = 45.70 : x
  2. Step 2: Convert to fraction form
    93.76/140.64 = 45.70/x
  3. Step 3: Cross multiply
    93.76x = 140.64 × 45.70
  4. Step 4: Simplify right side
    93.76x = 6,427.25
  5. Step 5: Solve for x
    x = 6,427.25/93.76
  6. Step 6: Final answer
    x = 68.55

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