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Finding the Fourth Proportional to 99.93, 149.81 and 45.89

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Solution

The fourth proportional to 99.93, 149.81 and 45.89 is: 68.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.93 : 149.81 = 45.89 : x
  2. Step 2: Convert to fraction form
    99.93/149.81 = 45.89/x
  3. Step 3: Cross multiply
    99.93x = 149.81 × 45.89
  4. Step 4: Simplify right side
    99.93x = 6,873.80
  5. Step 5: Solve for x
    x = 6,873.80/99.93
  6. Step 6: Final answer
    x = 68.79

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