Home / 128,245.48-192,359.10-39,489.73

Finding the Fourth Proportional to 128,245.48, 192,359.10 and 39,489.73

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Solution

The fourth proportional to 128,245.48, 192,359.10 and 39,489.73 is: 59,231.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,245.48 : 192,359.10 = 39,489.73 : x
  2. Step 2: Convert to fraction form
    128,245.48/192,359.10 = 39,489.73/x
  3. Step 3: Cross multiply
    128,245.48x = 192,359.10 × 39,489.73
  4. Step 4: Simplify right side
    128,245.48x = 7,596,208,589.23
  5. Step 5: Solve for x
    x = 7,596,208,589.23/128,245.48
  6. Step 6: Final answer
    x = 59,231.79

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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.