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Finding the Fourth Proportional to 102,978, 142,111.80 and 58,266

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Solution

The fourth proportional to 102,978, 142,111.80 and 58,266 is: 80,408.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,978 : 142,111.80 = 58,266 : x
  2. Step 2: Convert to fraction form
    102,978/142,111.80 = 58,266/x
  3. Step 3: Cross multiply
    102,978x = 142,111.80 × 58,266
  4. Step 4: Simplify right side
    102,978x = 8,280,286,138.80
  5. Step 5: Solve for x
    x = 8,280,286,138.80/102,978
  6. Step 6: Final answer
    x = 80,408.30

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