Home / 420,077.96-629,927.40-120,489.80

Finding the Fourth Proportional to 420,077.96, 629,927.40 and 120,489.80

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Solution

The fourth proportional to 420,077.96, 629,927.40 and 120,489.80 is: 180,680.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,077.96 : 629,927.40 = 120,489.80 : x
  2. Step 2: Convert to fraction form
    420,077.96/629,927.40 = 120,489.80/x
  3. Step 3: Cross multiply
    420,077.96x = 629,927.40 × 120,489.80
  4. Step 4: Simplify right side
    420,077.96x = 75,899,826,440.52
  5. Step 5: Solve for x
    x = 75,899,826,440.52/420,077.96
  6. Step 6: Final answer
    x = 180,680.33

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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.