Home / 90,786.72-136,183.74-31,628.38

Finding the Fourth Proportional to 90,786.72, 136,183.74 and 31,628.38

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Solution

The fourth proportional to 90,786.72, 136,183.74 and 31,628.38 is: 47,443.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,786.72 : 136,183.74 = 31,628.38 : x
  2. Step 2: Convert to fraction form
    90,786.72/136,183.74 = 31,628.38/x
  3. Step 3: Cross multiply
    90,786.72x = 136,183.74 × 31,628.38
  4. Step 4: Simplify right side
    90,786.72x = 4,307,271,078.54
  5. Step 5: Solve for x
    x = 4,307,271,078.54/90,786.72
  6. Step 6: Final answer
    x = 47,443.85

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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.