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Finding the Fourth Proportional to 172,987.20, 259,869.60 and 168,321.60

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Solution

The fourth proportional to 172,987.20, 259,869.60 and 168,321.60 is: 252,860.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,987.20 : 259,869.60 = 168,321.60 : x
  2. Step 2: Convert to fraction form
    172,987.20/259,869.60 = 168,321.60/x
  3. Step 3: Cross multiply
    172,987.20x = 259,869.60 × 168,321.60
  4. Step 4: Simplify right side
    172,987.20x = 43,741,666,863.36
  5. Step 5: Solve for x
    x = 43,741,666,863.36/172,987.20
  6. Step 6: Final answer
    x = 252,860.71

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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.