Home / 205,123.20-307,684.80-135,081.60

Finding the Fourth Proportional to 205,123.20, 307,684.80 and 135,081.60

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Solution

The fourth proportional to 205,123.20, 307,684.80 and 135,081.60 is: 202,622.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,123.20 : 307,684.80 = 135,081.60 : x
  2. Step 2: Convert to fraction form
    205,123.20/307,684.80 = 135,081.60/x
  3. Step 3: Cross multiply
    205,123.20x = 307,684.80 × 135,081.60
  4. Step 4: Simplify right side
    205,123.20x = 41,562,555,079.68
  5. Step 5: Solve for x
    x = 41,562,555,079.68/205,123.20
  6. Step 6: Final answer
    x = 202,622.40

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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.