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Finding the Fourth Proportional to 280,056.62, 420,086.25 and 69,694.56

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Solution

The fourth proportional to 280,056.62, 420,086.25 and 69,694.56 is: 104,542.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,056.62 : 420,086.25 = 69,694.56 : x
  2. Step 2: Convert to fraction form
    280,056.62/420,086.25 = 69,694.56/x
  3. Step 3: Cross multiply
    280,056.62x = 420,086.25 × 69,694.56
  4. Step 4: Simplify right side
    280,056.62x = 29,277,726,355.80
  5. Step 5: Solve for x
    x = 29,277,726,355.80/280,056.62
  6. Step 6: Final answer
    x = 104,542.17

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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.