Home / 85,614.20-128,334.90-38,900.60

Finding the Fourth Proportional to 85,614.20, 128,334.90 and 38,900.60

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Solution

The fourth proportional to 85,614.20, 128,334.90 and 38,900.60 is: 58,311.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,614.20 : 128,334.90 = 38,900.60 : x
  2. Step 2: Convert to fraction form
    85,614.20/128,334.90 = 38,900.60/x
  3. Step 3: Cross multiply
    85,614.20x = 128,334.90 × 38,900.60
  4. Step 4: Simplify right side
    85,614.20x = 4,992,304,610.94
  5. Step 5: Solve for x
    x = 4,992,304,610.94/85,614.20
  6. Step 6: Final answer
    x = 58,311.64

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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.