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Finding the Fourth Proportional to 280,179.80, 420,272.75 and 80,501.84

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Solution

The fourth proportional to 280,179.80, 420,272.75 and 80,501.84 is: 120,753.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,179.80 : 420,272.75 = 80,501.84 : x
  2. Step 2: Convert to fraction form
    280,179.80/420,272.75 = 80,501.84/x
  3. Step 3: Cross multiply
    280,179.80x = 420,272.75 × 80,501.84
  4. Step 4: Simplify right side
    280,179.80x = 33,832,729,676.86
  5. Step 5: Solve for x
    x = 33,832,729,676.86/280,179.80
  6. Step 6: Final answer
    x = 120,753.64

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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.