Home / 57,069.60-85,604.40-20,128.80

Finding the Fourth Proportional to 57,069.60, 85,604.40 and 20,128.80

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Solution

The fourth proportional to 57,069.60, 85,604.40 and 20,128.80 is: 30,193.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,069.60 : 85,604.40 = 20,128.80 : x
  2. Step 2: Convert to fraction form
    57,069.60/85,604.40 = 20,128.80/x
  3. Step 3: Cross multiply
    57,069.60x = 85,604.40 × 20,128.80
  4. Step 4: Simplify right side
    57,069.60x = 1,723,113,846.72
  5. Step 5: Solve for x
    x = 1,723,113,846.72/57,069.60
  6. Step 6: Final answer
    x = 30,193.20

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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.