Home / 280,027.12-420,001.26-80,364.64

Finding the Fourth Proportional to 280,027.12, 420,001.26 and 80,364.64

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Solution

The fourth proportional to 280,027.12, 420,001.26 and 80,364.64 is: 120,535.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,027.12 : 420,001.26 = 80,364.64 : x
  2. Step 2: Convert to fraction form
    280,027.12/420,001.26 = 80,364.64/x
  3. Step 3: Cross multiply
    280,027.12x = 420,001.26 × 80,364.64
  4. Step 4: Simplify right side
    280,027.12x = 33,753,250,059.45
  5. Step 5: Solve for x
    x = 33,753,250,059.45/280,027.12
  6. Step 6: Final answer
    x = 120,535.65

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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.