Home / 139,855.20-192,999.60-76,192.80

Finding the Fourth Proportional to 139,855.20, 192,999.60 and 76,192.80

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Solution

The fourth proportional to 139,855.20, 192,999.60 and 76,192.80 is: 105,145.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,855.20 : 192,999.60 = 76,192.80 : x
  2. Step 2: Convert to fraction form
    139,855.20/192,999.60 = 76,192.80/x
  3. Step 3: Cross multiply
    139,855.20x = 192,999.60 × 76,192.80
  4. Step 4: Simplify right side
    139,855.20x = 14,705,179,922.88
  5. Step 5: Solve for x
    x = 14,705,179,922.88/139,855.20
  6. Step 6: Final answer
    x = 105,145.75

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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.