Home / 72,729.28-109,093.92-20,137.60

Finding the Fourth Proportional to 72,729.28, 109,093.92 and 20,137.60

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Solution

The fourth proportional to 72,729.28, 109,093.92 and 20,137.60 is: 30,206.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,729.28 : 109,093.92 = 20,137.60 : x
  2. Step 2: Convert to fraction form
    72,729.28/109,093.92 = 20,137.60/x
  3. Step 3: Cross multiply
    72,729.28x = 109,093.92 × 20,137.60
  4. Step 4: Simplify right side
    72,729.28x = 2,196,889,723.39
  5. Step 5: Solve for x
    x = 2,196,889,723.39/72,729.28
  6. Step 6: Final answer
    x = 30,206.40

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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.