Home / 280,116.39-420,110.60-80,435.19

Finding the Fourth Proportional to 280,116.39, 420,110.60 and 80,435.19

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Solution

The fourth proportional to 280,116.39, 420,110.60 and 80,435.19 is: 120,634.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,116.39 : 420,110.60 = 80,435.19 : x
  2. Step 2: Convert to fraction form
    280,116.39/420,110.60 = 80,435.19/x
  3. Step 3: Cross multiply
    280,116.39x = 420,110.60 × 80,435.19
  4. Step 4: Simplify right side
    280,116.39x = 33,791,675,529.84
  5. Step 5: Solve for x
    x = 33,791,675,529.84/280,116.39
  6. Step 6: Final answer
    x = 120,634.41

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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.