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Finding the Fourth Proportional to 217,647.81, 300,368.85 and 120,856.66

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Solution

The fourth proportional to 217,647.81, 300,368.85 and 120,856.66 is: 166,790.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,647.81 : 300,368.85 = 120,856.66 : x
  2. Step 2: Convert to fraction form
    217,647.81/300,368.85 = 120,856.66/x
  3. Step 3: Cross multiply
    217,647.81x = 300,368.85 × 120,856.66
  4. Step 4: Simplify right side
    217,647.81x = 36,301,575,979.04
  5. Step 5: Solve for x
    x = 36,301,575,979.04/217,647.81
  6. Step 6: Final answer
    x = 166,790.45

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