Home / 85,579.82-128,400.36-38,190.74

Finding the Fourth Proportional to 85,579.82, 128,400.36 and 38,190.74

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Solution

The fourth proportional to 85,579.82, 128,400.36 and 38,190.74 is: 57,299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,579.82 : 128,400.36 = 38,190.74 : x
  2. Step 2: Convert to fraction form
    85,579.82/128,400.36 = 38,190.74/x
  3. Step 3: Cross multiply
    85,579.82x = 128,400.36 × 38,190.74
  4. Step 4: Simplify right side
    85,579.82x = 4,903,704,764.67
  5. Step 5: Solve for x
    x = 4,903,704,764.67/85,579.82
  6. Step 6: Final answer
    x = 57,299.78

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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.