Home / 198,939.24-298,321.38-105,423.12

Finding the Fourth Proportional to 198,939.24, 298,321.38 and 105,423.12

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Solution

The fourth proportional to 198,939.24, 298,321.38 and 105,423.12 is: 158,088.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,939.24 : 298,321.38 = 105,423.12 : x
  2. Step 2: Convert to fraction form
    198,939.24/298,321.38 = 105,423.12/x
  3. Step 3: Cross multiply
    198,939.24x = 298,321.38 × 105,423.12
  4. Step 4: Simplify right side
    198,939.24x = 31,449,970,642.31
  5. Step 5: Solve for x
    x = 31,449,970,642.31/198,939.24
  6. Step 6: Final answer
    x = 158,088.32

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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.