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Finding the Fourth Proportional to 78,611.88, 108,485.14 and 45,071.40

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Solution

The fourth proportional to 78,611.88, 108,485.14 and 45,071.40 is: 62,198.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,611.88 : 108,485.14 = 45,071.40 : x
  2. Step 2: Convert to fraction form
    78,611.88/108,485.14 = 45,071.40/x
  3. Step 3: Cross multiply
    78,611.88x = 108,485.14 × 45,071.40
  4. Step 4: Simplify right side
    78,611.88x = 4,889,577,139.00
  5. Step 5: Solve for x
    x = 4,889,577,139.00/78,611.88
  6. Step 6: Final answer
    x = 62,198.96

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