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Finding the Fourth Proportional to 67,408.40, 101,117.40 and 20,661.20

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Solution

The fourth proportional to 67,408.40, 101,117.40 and 20,661.20 is: 30,993.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,408.40 : 101,117.40 = 20,661.20 : x
  2. Step 2: Convert to fraction form
    67,408.40/101,117.40 = 20,661.20/x
  3. Step 3: Cross multiply
    67,408.40x = 101,117.40 × 20,661.20
  4. Step 4: Simplify right side
    67,408.40x = 2,089,206,824.88
  5. Step 5: Solve for x
    x = 2,089,206,824.88/67,408.40
  6. Step 6: Final answer
    x = 30,993.27

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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.