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Finding the Fourth Proportional to 86,978, 120,029.64 and 47,234

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Solution

The fourth proportional to 86,978, 120,029.64 and 47,234 is: 65,182.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,978 : 120,029.64 = 47,234 : x
  2. Step 2: Convert to fraction form
    86,978/120,029.64 = 47,234/x
  3. Step 3: Cross multiply
    86,978x = 120,029.64 × 47,234
  4. Step 4: Simplify right side
    86,978x = 5,669,480,015.76
  5. Step 5: Solve for x
    x = 5,669,480,015.76/86,978
  6. Step 6: Final answer
    x = 65,182.92

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