Home / 280,120.28-420,056.48-80,394.34

Finding the Fourth Proportional to 280,120.28, 420,056.48 and 80,394.34

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Solution

The fourth proportional to 280,120.28, 420,056.48 and 80,394.34 is: 120,555.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,120.28 : 420,056.48 = 80,394.34 : x
  2. Step 2: Convert to fraction form
    280,120.28/420,056.48 = 80,394.34/x
  3. Step 3: Cross multiply
    280,120.28x = 420,056.48 × 80,394.34
  4. Step 4: Simplify right side
    280,120.28x = 33,770,163,472.32
  5. Step 5: Solve for x
    x = 33,770,163,472.32/280,120.28
  6. Step 6: Final answer
    x = 120,555.94

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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.