Home / 51,383.66-77,119.20-20,240.78

Finding the Fourth Proportional to 51,383.66, 77,119.20 and 20,240.78

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Solution

The fourth proportional to 51,383.66, 77,119.20 and 20,240.78 is: 30,378.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,383.66 : 77,119.20 = 20,240.78 : x
  2. Step 2: Convert to fraction form
    51,383.66/77,119.20 = 20,240.78/x
  3. Step 3: Cross multiply
    51,383.66x = 77,119.20 × 20,240.78
  4. Step 4: Simplify right side
    51,383.66x = 1,560,952,760.98
  5. Step 5: Solve for x
    x = 1,560,952,760.98/51,383.66
  6. Step 6: Final answer
    x = 30,378.39

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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.