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Finding the Fourth Proportional to 315,081.09, 434,815.24 and 171,843.53

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Solution

The fourth proportional to 315,081.09, 434,815.24 and 171,843.53 is: 237,145.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,081.09 : 434,815.24 = 171,843.53 : x
  2. Step 2: Convert to fraction form
    315,081.09/434,815.24 = 171,843.53/x
  3. Step 3: Cross multiply
    315,081.09x = 434,815.24 × 171,843.53
  4. Step 4: Simplify right side
    315,081.09x = 74,720,183,457.92
  5. Step 5: Solve for x
    x = 74,720,183,457.92/315,081.09
  6. Step 6: Final answer
    x = 237,145.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.