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Finding the Fourth Proportional to 89,811, 134,716.52 and 39,879.36

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Solution

The fourth proportional to 89,811, 134,716.52 and 39,879.36 is: 59,819.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,811 : 134,716.52 = 39,879.36 : x
  2. Step 2: Convert to fraction form
    89,811/134,716.52 = 39,879.36/x
  3. Step 3: Cross multiply
    89,811x = 134,716.52 × 39,879.36
  4. Step 4: Simplify right side
    89,811x = 5,372,408,599.03
  5. Step 5: Solve for x
    x = 5,372,408,599.03/89,811
  6. Step 6: Final answer
    x = 59,819.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.