Home / 280,669.38-420,720.39-120,849.54

Finding the Fourth Proportional to 280,669.38, 420,720.39 and 120,849.54

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Solution

The fourth proportional to 280,669.38, 420,720.39 and 120,849.54 is: 181,152.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,669.38 : 420,720.39 = 120,849.54 : x
  2. Step 2: Convert to fraction form
    280,669.38/420,720.39 = 120,849.54/x
  3. Step 3: Cross multiply
    280,669.38x = 420,720.39 × 120,849.54
  4. Step 4: Simplify right side
    280,669.38x = 50,843,865,600.12
  5. Step 5: Solve for x
    x = 50,843,865,600.12/280,669.38
  6. Step 6: Final answer
    x = 181,152.16

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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.