Home / 198,939.76-298,426-86,623.68

Finding the Fourth Proportional to 198,939.76, 298,426 and 86,623.68

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Solution

The fourth proportional to 198,939.76, 298,426 and 86,623.68 is: 129,942.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,939.76 : 298,426 = 86,623.68 : x
  2. Step 2: Convert to fraction form
    198,939.76/298,426 = 86,623.68/x
  3. Step 3: Cross multiply
    198,939.76x = 298,426 × 86,623.68
  4. Step 4: Simplify right side
    198,939.76x = 25,850,758,327.68
  5. Step 5: Solve for x
    x = 25,850,758,327.68/198,939.76
  6. Step 6: Final answer
    x = 129,942.64

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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.