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Finding the Fourth Proportional to 103,623.90, 155,435.85 and 70,359.90

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Solution

The fourth proportional to 103,623.90, 155,435.85 and 70,359.90 is: 105,539.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,623.90 : 155,435.85 = 70,359.90 : x
  2. Step 2: Convert to fraction form
    103,623.90/155,435.85 = 70,359.90/x
  3. Step 3: Cross multiply
    103,623.90x = 155,435.85 × 70,359.90
  4. Step 4: Simplify right side
    103,623.90x = 10,936,450,862.42
  5. Step 5: Solve for x
    x = 10,936,450,862.42/103,623.90
  6. Step 6: Final answer
    x = 105,539.85

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