Home / 319,990.20-479,855.70-109,519.80

Finding the Fourth Proportional to 319,990.20, 479,855.70 and 109,519.80

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Solution

The fourth proportional to 319,990.20, 479,855.70 and 109,519.80 is: 164,235.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,990.20 : 479,855.70 = 109,519.80 : x
  2. Step 2: Convert to fraction form
    319,990.20/479,855.70 = 109,519.80/x
  3. Step 3: Cross multiply
    319,990.20x = 479,855.70 × 109,519.80
  4. Step 4: Simplify right side
    319,990.20x = 52,553,700,292.86
  5. Step 5: Solve for x
    x = 52,553,700,292.86/319,990.20
  6. Step 6: Final answer
    x = 164,235.34

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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.