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Finding the Fourth Proportional to 420,842.54, 631,266.22 and 140,358.98

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Solution

The fourth proportional to 420,842.54, 631,266.22 and 140,358.98 is: 210,539.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,842.54 : 631,266.22 = 140,358.98 : x
  2. Step 2: Convert to fraction form
    420,842.54/631,266.22 = 140,358.98/x
  3. Step 3: Cross multiply
    420,842.54x = 631,266.22 × 140,358.98
  4. Step 4: Simplify right side
    420,842.54x = 88,603,882,747.66
  5. Step 5: Solve for x
    x = 88,603,882,747.66/420,842.54
  6. Step 6: Final answer
    x = 210,539.27

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