Home / 45,148.80-67,720.32-20,190.72

Finding the Fourth Proportional to 45,148.80, 67,720.32 and 20,190.72

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Solution

The fourth proportional to 45,148.80, 67,720.32 and 20,190.72 is: 30,284.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,148.80 : 67,720.32 = 20,190.72 : x
  2. Step 2: Convert to fraction form
    45,148.80/67,720.32 = 20,190.72/x
  3. Step 3: Cross multiply
    45,148.80x = 67,720.32 × 20,190.72
  4. Step 4: Simplify right side
    45,148.80x = 1,367,322,019.43
  5. Step 5: Solve for x
    x = 1,367,322,019.43/45,148.80
  6. Step 6: Final answer
    x = 30,284.79

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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.