Home / 103,019.21-154,504.57-28,121.55

Finding the Fourth Proportional to 103,019.21, 154,504.57 and 28,121.55

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Solution

The fourth proportional to 103,019.21, 154,504.57 and 28,121.55 is: 42,175.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,019.21 : 154,504.57 = 28,121.55 : x
  2. Step 2: Convert to fraction form
    103,019.21/154,504.57 = 28,121.55/x
  3. Step 3: Cross multiply
    103,019.21x = 154,504.57 × 28,121.55
  4. Step 4: Simplify right side
    103,019.21x = 4,344,907,990.48
  5. Step 5: Solve for x
    x = 4,344,907,990.48/103,019.21
  6. Step 6: Final answer
    x = 42,175.71

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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.