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Finding the Fourth Proportional to 172,969.20, 259,367.40 and 79,369.20

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Solution

The fourth proportional to 172,969.20, 259,367.40 and 79,369.20 is: 119,014.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,969.20 : 259,367.40 = 79,369.20 : x
  2. Step 2: Convert to fraction form
    172,969.20/259,367.40 = 79,369.20/x
  3. Step 3: Cross multiply
    172,969.20x = 259,367.40 × 79,369.20
  4. Step 4: Simplify right side
    172,969.20x = 20,585,783,044.08
  5. Step 5: Solve for x
    x = 20,585,783,044.08/172,969.20
  6. Step 6: Final answer
    x = 119,014.15

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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.