Home / 51,979.11-71,731.23-28,105.78

Finding the Fourth Proportional to 51,979.11, 71,731.23 and 28,105.78

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Solution

The fourth proportional to 51,979.11, 71,731.23 and 28,105.78 is: 38,786.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,979.11 : 71,731.23 = 28,105.78 : x
  2. Step 2: Convert to fraction form
    51,979.11/71,731.23 = 28,105.78/x
  3. Step 3: Cross multiply
    51,979.11x = 71,731.23 × 28,105.78
  4. Step 4: Simplify right side
    51,979.11x = 2,016,062,028.98
  5. Step 5: Solve for x
    x = 2,016,062,028.98/51,979.11
  6. Step 6: Final answer
    x = 38,786.01

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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.