Home / 120,155.70-180,233.55-109,269.30

Finding the Fourth Proportional to 120,155.70, 180,233.55 and 109,269.30

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Solution

The fourth proportional to 120,155.70, 180,233.55 and 109,269.30 is: 163,903.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,155.70 : 180,233.55 = 109,269.30 : x
  2. Step 2: Convert to fraction form
    120,155.70/180,233.55 = 109,269.30/x
  3. Step 3: Cross multiply
    120,155.70x = 180,233.55 × 109,269.30
  4. Step 4: Simplify right side
    120,155.70x = 19,693,993,845.02
  5. Step 5: Solve for x
    x = 19,693,993,845.02/120,155.70
  6. Step 6: Final answer
    x = 163,903.95

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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.