Home / 85,579.53-128,399.70-38,190.31

Finding the Fourth Proportional to 85,579.53, 128,399.70 and 38,190.31

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Solution

The fourth proportional to 85,579.53, 128,399.70 and 38,190.31 is: 57,299.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,579.53 : 128,399.70 = 38,190.31 : x
  2. Step 2: Convert to fraction form
    85,579.53/128,399.70 = 38,190.31/x
  3. Step 3: Cross multiply
    85,579.53x = 128,399.70 × 38,190.31
  4. Step 4: Simplify right side
    85,579.53x = 4,903,624,169.12
  5. Step 5: Solve for x
    x = 4,903,624,169.12/85,579.53
  6. Step 6: Final answer
    x = 57,299.03

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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.