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Finding the Fourth Proportional to 57,121.20, 85,662.90 and 19,674.90

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Solution

The fourth proportional to 57,121.20, 85,662.90 and 19,674.90 is: 29,505.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,121.20 : 85,662.90 = 19,674.90 : x
  2. Step 2: Convert to fraction form
    57,121.20/85,662.90 = 19,674.90/x
  3. Step 3: Cross multiply
    57,121.20x = 85,662.90 × 19,674.90
  4. Step 4: Simplify right side
    57,121.20x = 1,685,408,991.21
  5. Step 5: Solve for x
    x = 1,685,408,991.21/57,121.20
  6. Step 6: Final answer
    x = 29,505.84

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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.