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Finding the Fourth Proportional to 172,112.20, 258,241.20 and 108,980.80

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Solution

The fourth proportional to 172,112.20, 258,241.20 and 108,980.80 is: 163,517.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,112.20 : 258,241.20 = 108,980.80 : x
  2. Step 2: Convert to fraction form
    172,112.20/258,241.20 = 108,980.80/x
  3. Step 3: Cross multiply
    172,112.20x = 258,241.20 × 108,980.80
  4. Step 4: Simplify right side
    172,112.20x = 28,143,332,568.96
  5. Step 5: Solve for x
    x = 28,143,332,568.96/172,112.20
  6. Step 6: Final answer
    x = 163,517.36

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1.5x scale

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.