Home / 81,410.20-122,115.30-71,568.70

Finding the Fourth Proportional to 81,410.20, 122,115.30 and 71,568.70

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Solution

The fourth proportional to 81,410.20, 122,115.30 and 71,568.70 is: 107,353.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,410.20 : 122,115.30 = 71,568.70 : x
  2. Step 2: Convert to fraction form
    81,410.20/122,115.30 = 71,568.70/x
  3. Step 3: Cross multiply
    81,410.20x = 122,115.30 × 71,568.70
  4. Step 4: Simplify right side
    81,410.20x = 8,739,633,271.11
  5. Step 5: Solve for x
    x = 8,739,633,271.11/81,410.20
  6. Step 6: Final answer
    x = 107,353.05

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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.