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Finding the Fourth Proportional to 81,696,978.40, 122,419,496.40 and 70,863,455.20

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Solution

The fourth proportional to 81,696,978.40, 122,419,496.40 and 70,863,455.20 is: 106,185,916.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,696,978.40 : 122,419,496.40 = 70,863,455.20 : x
  2. Step 2: Convert to fraction form
    81,696,978.40/122,419,496.40 = 70,863,455.20/x
  3. Step 3: Cross multiply
    81,696,978.40x = 122,419,496.40 × 70,863,455.20
  4. Step 4: Simplify right side
    81,696,978.40x = 8,675,068,498,747,962
  5. Step 5: Solve for x
    x = 8,675,068,498,747,962/81,696,978.40
  6. Step 6: Final answer
    x = 106,185,916.16

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