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Finding the Fourth Proportional to 90,568.40, 135,852.60 and 28,245.20

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Solution

The fourth proportional to 90,568.40, 135,852.60 and 28,245.20 is: 42,367.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,568.40 : 135,852.60 = 28,245.20 : x
  2. Step 2: Convert to fraction form
    90,568.40/135,852.60 = 28,245.20/x
  3. Step 3: Cross multiply
    90,568.40x = 135,852.60 × 28,245.20
  4. Step 4: Simplify right side
    90,568.40x = 3,837,183,857.52
  5. Step 5: Solve for x
    x = 3,837,183,857.52/90,568.40
  6. Step 6: Final answer
    x = 42,367.80

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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.