Home / 285,571.20-428,377.92-85,875.36

Finding the Fourth Proportional to 285,571.20, 428,377.92 and 85,875.36

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Solution

The fourth proportional to 285,571.20, 428,377.92 and 85,875.36 is: 128,819.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,571.20 : 428,377.92 = 85,875.36 : x
  2. Step 2: Convert to fraction form
    285,571.20/428,377.92 = 85,875.36/x
  3. Step 3: Cross multiply
    285,571.20x = 428,377.92 × 85,875.36
  4. Step 4: Simplify right side
    285,571.20x = 36,787,108,096.05
  5. Step 5: Solve for x
    x = 36,787,108,096.05/285,571.20
  6. Step 6: Final answer
    x = 128,819.39

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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.