Home / 285,309.30-427,769.55-135,621.30

Finding the Fourth Proportional to 285,309.30, 427,769.55 and 135,621.30

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Solution

The fourth proportional to 285,309.30, 427,769.55 and 135,621.30 is: 203,339.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,309.30 : 427,769.55 = 135,621.30 : x
  2. Step 2: Convert to fraction form
    285,309.30/427,769.55 = 135,621.30/x
  3. Step 3: Cross multiply
    285,309.30x = 427,769.55 × 135,621.30
  4. Step 4: Simplify right side
    285,309.30x = 58,014,662,471.42
  5. Step 5: Solve for x
    x = 58,014,662,471.42/285,309.30
  6. Step 6: Final answer
    x = 203,339.54

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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.