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Finding the Fourth Proportional to 172,991.20, 259,875.60 and 168,325.60

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Solution

The fourth proportional to 172,991.20, 259,875.60 and 168,325.60 is: 252,866.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,991.20 : 259,875.60 = 168,325.60 : x
  2. Step 2: Convert to fraction form
    172,991.20/259,875.60 = 168,325.60/x
  3. Step 3: Cross multiply
    172,991.20x = 259,875.60 × 168,325.60
  4. Step 4: Simplify right side
    172,991.20x = 43,743,716,295.36
  5. Step 5: Solve for x
    x = 43,743,716,295.36/172,991.20
  6. Step 6: Final answer
    x = 252,866.71

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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.