Home / 280,013.15-420,074.40-111,504.80

Finding the Fourth Proportional to 280,013.15, 420,074.40 and 111,504.80

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Solution

The fourth proportional to 280,013.15, 420,074.40 and 111,504.80 is: 167,278.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,013.15 : 420,074.40 = 111,504.80 : x
  2. Step 2: Convert to fraction form
    280,013.15/420,074.40 = 111,504.80/x
  3. Step 3: Cross multiply
    280,013.15x = 420,074.40 × 111,504.80
  4. Step 4: Simplify right side
    280,013.15x = 46,840,311,957.12
  5. Step 5: Solve for x
    x = 46,840,311,957.12/280,013.15
  6. Step 6: Final answer
    x = 167,278.97

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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.