Home / 285,039.27-427,438.62-85,388.04

Finding the Fourth Proportional to 285,039.27, 427,438.62 and 85,388.04

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Solution

The fourth proportional to 285,039.27, 427,438.62 and 85,388.04 is: 128,046.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,039.27 : 427,438.62 = 85,388.04 : x
  2. Step 2: Convert to fraction form
    285,039.27/427,438.62 = 85,388.04/x
  3. Step 3: Cross multiply
    285,039.27x = 427,438.62 × 85,388.04
  4. Step 4: Simplify right side
    285,039.27x = 36,498,145,982.10
  5. Step 5: Solve for x
    x = 36,498,145,982.10/285,039.27
  6. Step 6: Final answer
    x = 128,046.03

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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.