Home / 85,589.09-128,414.03-38,199.87

Finding the Fourth Proportional to 85,589.09, 128,414.03 and 38,199.87

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Solution

The fourth proportional to 85,589.09, 128,414.03 and 38,199.87 is: 57,313.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,589.09 : 128,414.03 = 38,199.87 : x
  2. Step 2: Convert to fraction form
    85,589.09/128,414.03 = 38,199.87/x
  3. Step 3: Cross multiply
    85,589.09x = 128,414.03 × 38,199.87
  4. Step 4: Simplify right side
    85,589.09x = 4,905,399,061.18
  5. Step 5: Solve for x
    x = 4,905,399,061.18/85,589.09
  6. Step 6: Final answer
    x = 57,313.37

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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.