Home / 120,156.20-180,234.30-109,269.80

Finding the Fourth Proportional to 120,156.20, 180,234.30 and 109,269.80

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Solution

The fourth proportional to 120,156.20, 180,234.30 and 109,269.80 is: 163,904.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,156.20 : 180,234.30 = 109,269.80 : x
  2. Step 2: Convert to fraction form
    120,156.20/180,234.30 = 109,269.80/x
  3. Step 3: Cross multiply
    120,156.20x = 180,234.30 × 109,269.80
  4. Step 4: Simplify right side
    120,156.20x = 19,694,165,914.14
  5. Step 5: Solve for x
    x = 19,694,165,914.14/120,156.20
  6. Step 6: Final answer
    x = 163,904.70

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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.