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Finding the Fourth Proportional to 85,951.72, 128,852.70 and 69,282.28

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Solution

The fourth proportional to 85,951.72, 128,852.70 and 69,282.28 is: 103,863.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,951.72 : 128,852.70 = 69,282.28 : x
  2. Step 2: Convert to fraction form
    85,951.72/128,852.70 = 69,282.28/x
  3. Step 3: Cross multiply
    85,951.72x = 128,852.70 × 69,282.28
  4. Step 4: Simplify right side
    85,951.72x = 8,927,208,840.16
  5. Step 5: Solve for x
    x = 8,927,208,840.16/85,951.72
  6. Step 6: Final answer
    x = 103,863.06

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