Home / 280,131.55-420,198.87-69,769.50

Finding the Fourth Proportional to 280,131.55, 420,198.87 and 69,769.50

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Solution

The fourth proportional to 280,131.55, 420,198.87 and 69,769.50 is: 104,654.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,131.55 : 420,198.87 = 69,769.50 : x
  2. Step 2: Convert to fraction form
    280,131.55/420,198.87 = 69,769.50/x
  3. Step 3: Cross multiply
    280,131.55x = 420,198.87 × 69,769.50
  4. Step 4: Simplify right side
    280,131.55x = 29,317,065,060.47
  5. Step 5: Solve for x
    x = 29,317,065,060.47/280,131.55
  6. Step 6: Final answer
    x = 104,654.63

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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.