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Finding the Fourth Proportional to 170,080.54, 255,120.30 and 81,313.30

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Solution

The fourth proportional to 170,080.54, 255,120.30 and 81,313.30 is: 121,969.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,080.54 : 255,120.30 = 81,313.30 : x
  2. Step 2: Convert to fraction form
    170,080.54/255,120.30 = 81,313.30/x
  3. Step 3: Cross multiply
    170,080.54x = 255,120.30 × 81,313.30
  4. Step 4: Simplify right side
    170,080.54x = 20,744,673,489.99
  5. Step 5: Solve for x
    x = 20,744,673,489.99/170,080.54
  6. Step 6: Final answer
    x = 121,969.71

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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.