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Finding the Fourth Proportional to 169,791.40, 254,687.10 and 80,999.20

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Solution

The fourth proportional to 169,791.40, 254,687.10 and 80,999.20 is: 121,498.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,791.40 : 254,687.10 = 80,999.20 : x
  2. Step 2: Convert to fraction form
    169,791.40/254,687.10 = 80,999.20/x
  3. Step 3: Cross multiply
    169,791.40x = 254,687.10 × 80,999.20
  4. Step 4: Simplify right side
    169,791.40x = 20,629,451,350.32
  5. Step 5: Solve for x
    x = 20,629,451,350.32/169,791.40
  6. Step 6: Final answer
    x = 121,498.80

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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.