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Finding the Fourth Proportional to 217,618.40, 300,306.66 and 120,820.16

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Solution

The fourth proportional to 217,618.40, 300,306.66 and 120,820.16 is: 166,728.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,618.40 : 300,306.66 = 120,820.16 : x
  2. Step 2: Convert to fraction form
    217,618.40/300,306.66 = 120,820.16/x
  3. Step 3: Cross multiply
    217,618.40x = 300,306.66 × 120,820.16
  4. Step 4: Simplify right side
    217,618.40x = 36,283,099,007.96
  5. Step 5: Solve for x
    x = 36,283,099,007.96/217,618.40
  6. Step 6: Final answer
    x = 166,728.08

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