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Finding the Fourth Proportional to 120,347.28, 166,014.90 and 77,832

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Solution

The fourth proportional to 120,347.28, 166,014.90 and 77,832 is: 107,366.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,347.28 : 166,014.90 = 77,832 : x
  2. Step 2: Convert to fraction form
    120,347.28/166,014.90 = 77,832/x
  3. Step 3: Cross multiply
    120,347.28x = 166,014.90 × 77,832
  4. Step 4: Simplify right side
    120,347.28x = 12,921,271,696.80
  5. Step 5: Solve for x
    x = 12,921,271,696.80/120,347.28
  6. Step 6: Final answer
    x = 107,366.55

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