Home / 280,724.29-420,961.35-80,997.19

Finding the Fourth Proportional to 280,724.29, 420,961.35 and 80,997.19

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Solution

The fourth proportional to 280,724.29, 420,961.35 and 80,997.19 is: 121,459.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,724.29 : 420,961.35 = 80,997.19 : x
  2. Step 2: Convert to fraction form
    280,724.29/420,961.35 = 80,997.19/x
  3. Step 3: Cross multiply
    280,724.29x = 420,961.35 × 80,997.19
  4. Step 4: Simplify right side
    280,724.29x = 34,096,686,448.61
  5. Step 5: Solve for x
    x = 34,096,686,448.61/280,724.29
  6. Step 6: Final answer
    x = 121,459.69

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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.