Home / 280,240.34-420,430.92-80,561.09

Finding the Fourth Proportional to 280,240.34, 420,430.92 and 80,561.09

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Solution

The fourth proportional to 280,240.34, 420,430.92 and 80,561.09 is: 120,861.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,240.34 : 420,430.92 = 80,561.09 : x
  2. Step 2: Convert to fraction form
    280,240.34/420,430.92 = 80,561.09/x
  3. Step 3: Cross multiply
    280,240.34x = 420,430.92 × 80,561.09
  4. Step 4: Simplify right side
    280,240.34x = 33,870,374,235.98
  5. Step 5: Solve for x
    x = 33,870,374,235.98/280,240.34
  6. Step 6: Final answer
    x = 120,861.88

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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.