Home / 154,370.20-213,072.78-90,728.44

Finding the Fourth Proportional to 154,370.20, 213,072.78 and 90,728.44

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Solution

The fourth proportional to 154,370.20, 213,072.78 and 90,728.44 is: 125,229.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,370.20 : 213,072.78 = 90,728.44 : x
  2. Step 2: Convert to fraction form
    154,370.20/213,072.78 = 90,728.44/x
  3. Step 3: Cross multiply
    154,370.20x = 213,072.78 × 90,728.44
  4. Step 4: Simplify right side
    154,370.20x = 19,331,760,935.86
  5. Step 5: Solve for x
    x = 19,331,760,935.86/154,370.20
  6. Step 6: Final answer
    x = 125,229.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.