Home / 49,718.20-74,519.70-20,121.40

Finding the Fourth Proportional to 49,718.20, 74,519.70 and 20,121.40

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Solution

The fourth proportional to 49,718.20, 74,519.70 and 20,121.40 is: 30,158.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,718.20 : 74,519.70 = 20,121.40 : x
  2. Step 2: Convert to fraction form
    49,718.20/74,519.70 = 20,121.40/x
  3. Step 3: Cross multiply
    49,718.20x = 74,519.70 × 20,121.40
  4. Step 4: Simplify right side
    49,718.20x = 1,499,440,691.58
  5. Step 5: Solve for x
    x = 1,499,440,691.58/49,718.20
  6. Step 6: Final answer
    x = 30,158.79

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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.