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Finding the Fourth Proportional to 85,831.12, 128,702.76 and 35,897.56

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Solution

The fourth proportional to 85,831.12, 128,702.76 and 35,897.56 is: 53,827.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,831.12 : 128,702.76 = 35,897.56 : x
  2. Step 2: Convert to fraction form
    85,831.12/128,702.76 = 35,897.56/x
  3. Step 3: Cross multiply
    85,831.12x = 128,702.76 × 35,897.56
  4. Step 4: Simplify right side
    85,831.12x = 4,620,115,049.27
  5. Step 5: Solve for x
    x = 4,620,115,049.27/85,831.12
  6. Step 6: Final answer
    x = 53,827.97

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