Home / 120,165.21-180,072.50-67,589.37

Finding the Fourth Proportional to 120,165.21, 180,072.50 and 67,589.37

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Solution

The fourth proportional to 120,165.21, 180,072.50 and 67,589.37 is: 101,285.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,165.21 : 180,072.50 = 67,589.37 : x
  2. Step 2: Convert to fraction form
    120,165.21/180,072.50 = 67,589.37/x
  3. Step 3: Cross multiply
    120,165.21x = 180,072.50 × 67,589.37
  4. Step 4: Simplify right side
    120,165.21x = 12,170,986,491.38
  5. Step 5: Solve for x
    x = 12,170,986,491.38/120,165.21
  6. Step 6: Final answer
    x = 101,285.44

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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.