Home / 221,290.38-305,380.94-120,688.38

Finding the Fourth Proportional to 221,290.38, 305,380.94 and 120,688.38

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Solution

The fourth proportional to 221,290.38, 305,380.94 and 120,688.38 is: 166,550.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,290.38 : 305,380.94 = 120,688.38 : x
  2. Step 2: Convert to fraction form
    221,290.38/305,380.94 = 120,688.38/x
  3. Step 3: Cross multiply
    221,290.38x = 305,380.94 × 120,688.38
  4. Step 4: Simplify right side
    221,290.38x = 36,855,930,328.04
  5. Step 5: Solve for x
    x = 36,855,930,328.04/221,290.38
  6. Step 6: Final answer
    x = 166,550.08

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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.