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Finding the Fourth Proportional to 280,166.92, 420,253.25 and 80,486.80

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Solution

The fourth proportional to 280,166.92, 420,253.25 and 80,486.80 is: 120,731.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,166.92 : 420,253.25 = 80,486.80 : x
  2. Step 2: Convert to fraction form
    280,166.92/420,253.25 = 80,486.80/x
  3. Step 3: Cross multiply
    280,166.92x = 420,253.25 × 80,486.80
  4. Step 4: Simplify right side
    280,166.92x = 33,824,837,829.03
  5. Step 5: Solve for x
    x = 33,824,837,829.03/280,166.92
  6. Step 6: Final answer
    x = 120,731.02

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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.