Home / 85,556.20-128,247.90-38,842.60

Finding the Fourth Proportional to 85,556.20, 128,247.90 and 38,842.60

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Solution

The fourth proportional to 85,556.20, 128,247.90 and 38,842.60 is: 58,224.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,556.20 : 128,247.90 = 38,842.60 : x
  2. Step 2: Convert to fraction form
    85,556.20/128,247.90 = 38,842.60/x
  3. Step 3: Cross multiply
    85,556.20x = 128,247.90 × 38,842.60
  4. Step 4: Simplify right side
    85,556.20x = 4,981,481,880.54
  5. Step 5: Solve for x
    x = 4,981,481,880.54/85,556.20
  6. Step 6: Final answer
    x = 58,224.67

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1.5x scale

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.