Home / 280,724.60-420,961.82-80,997.53

Finding the Fourth Proportional to 280,724.60, 420,961.82 and 80,997.53

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Solution

The fourth proportional to 280,724.60, 420,961.82 and 80,997.53 is: 121,460.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,724.60 : 420,961.82 = 80,997.53 : x
  2. Step 2: Convert to fraction form
    280,724.60/420,961.82 = 80,997.53/x
  3. Step 3: Cross multiply
    280,724.60x = 420,961.82 × 80,997.53
  4. Step 4: Simplify right side
    280,724.60x = 34,096,865,134.51
  5. Step 5: Solve for x
    x = 34,096,865,134.51/280,724.60
  6. Step 6: Final answer
    x = 121,460.20

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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.