Home / 45,081.12-67,621.68-20,115.21

Finding the Fourth Proportional to 45,081.12, 67,621.68 and 20,115.21

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Solution

The fourth proportional to 45,081.12, 67,621.68 and 20,115.21 is: 30,172.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,081.12 : 67,621.68 = 20,115.21 : x
  2. Step 2: Convert to fraction form
    45,081.12/67,621.68 = 20,115.21/x
  3. Step 3: Cross multiply
    45,081.12x = 67,621.68 × 20,115.21
  4. Step 4: Simplify right side
    45,081.12x = 1,360,224,293.75
  5. Step 5: Solve for x
    x = 1,360,224,293.75/45,081.12
  6. Step 6: Final answer
    x = 30,172.82

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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.