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Finding the Fourth Proportional to 71,769.16, 107,676.79 and 21,858.92

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Solution

The fourth proportional to 71,769.16, 107,676.79 and 21,858.92 is: 32,795.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,769.16 : 107,676.79 = 21,858.92 : x
  2. Step 2: Convert to fraction form
    71,769.16/107,676.79 = 21,858.92/x
  3. Step 3: Cross multiply
    71,769.16x = 107,676.79 × 21,858.92
  4. Step 4: Simplify right side
    71,769.16x = 2,353,697,745.44
  5. Step 5: Solve for x
    x = 2,353,697,745.44/71,769.16
  6. Step 6: Final answer
    x = 32,795.39

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1.5x scale

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.