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Finding the Fourth Proportional to 70,272.56, 105,408.95 and 28,719.56

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Solution

The fourth proportional to 70,272.56, 105,408.95 and 28,719.56 is: 43,079.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,272.56 : 105,408.95 = 28,719.56 : x
  2. Step 2: Convert to fraction form
    70,272.56/105,408.95 = 28,719.56/x
  3. Step 3: Cross multiply
    70,272.56x = 105,408.95 × 28,719.56
  4. Step 4: Simplify right side
    70,272.56x = 3,027,298,783.99
  5. Step 5: Solve for x
    x = 3,027,298,783.99/70,272.56
  6. Step 6: Final answer
    x = 43,079.39

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