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Finding the Fourth Proportional to 172,990.80, 259,446.96 and 79,406.64

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Solution

The fourth proportional to 172,990.80, 259,446.96 and 79,406.64 is: 119,091.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,990.80 : 259,446.96 = 79,406.64 : x
  2. Step 2: Convert to fraction form
    172,990.80/259,446.96 = 79,406.64/x
  3. Step 3: Cross multiply
    172,990.80x = 259,446.96 × 79,406.64
  4. Step 4: Simplify right side
    172,990.80x = 20,601,811,351.81
  5. Step 5: Solve for x
    x = 20,601,811,351.81/172,990.80
  6. Step 6: Final answer
    x = 119,091.95

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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.