Home / 90,571.20-135,921.60-38,018.40

Finding the Fourth Proportional to 90,571.20, 135,921.60 and 38,018.40

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Solution

The fourth proportional to 90,571.20, 135,921.60 and 38,018.40 is: 57,054.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,571.20 : 135,921.60 = 38,018.40 : x
  2. Step 2: Convert to fraction form
    90,571.20/135,921.60 = 38,018.40/x
  3. Step 3: Cross multiply
    90,571.20x = 135,921.60 × 38,018.40
  4. Step 4: Simplify right side
    90,571.20x = 5,167,521,757.44
  5. Step 5: Solve for x
    x = 5,167,521,757.44/90,571.20
  6. Step 6: Final answer
    x = 57,054.80

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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.