Home / 139,828.20-209,742.30-135,940.20

Finding the Fourth Proportional to 139,828.20, 209,742.30 and 135,940.20

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Solution

The fourth proportional to 139,828.20, 209,742.30 and 135,940.20 is: 203,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,828.20 : 209,742.30 = 135,940.20 : x
  2. Step 2: Convert to fraction form
    139,828.20/209,742.30 = 135,940.20/x
  3. Step 3: Cross multiply
    139,828.20x = 209,742.30 × 135,940.20
  4. Step 4: Simplify right side
    139,828.20x = 28,512,410,210.46
  5. Step 5: Solve for x
    x = 28,512,410,210.46/139,828.20
  6. Step 6: Final answer
    x = 203,910.30

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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.