Home / 213,258.06-294,295.41-128,379.78

Finding the Fourth Proportional to 213,258.06, 294,295.41 and 128,379.78

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Solution

The fourth proportional to 213,258.06, 294,295.41 and 128,379.78 is: 177,163.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,258.06 : 294,295.41 = 128,379.78 : x
  2. Step 2: Convert to fraction form
    213,258.06/294,295.41 = 128,379.78/x
  3. Step 3: Cross multiply
    213,258.06x = 294,295.41 × 128,379.78
  4. Step 4: Simplify right side
    213,258.06x = 37,781,579,990.81
  5. Step 5: Solve for x
    x = 37,781,579,990.81/213,258.06
  6. Step 6: Final answer
    x = 177,163.67

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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.