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Finding the Fourth Proportional to 169,928.75, 254,893.12 and 80,912.39

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Solution

The fourth proportional to 169,928.75, 254,893.12 and 80,912.39 is: 121,368.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,928.75 : 254,893.12 = 80,912.39 : x
  2. Step 2: Convert to fraction form
    169,928.75/254,893.12 = 80,912.39/x
  3. Step 3: Cross multiply
    169,928.75x = 254,893.12 × 80,912.39
  4. Step 4: Simplify right side
    169,928.75x = 20,624,010,057.01
  5. Step 5: Solve for x
    x = 20,624,010,057.01/169,928.75
  6. Step 6: Final answer
    x = 121,368.57

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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.