Home / 230,402.75-317,945.66-128,439.41

Finding the Fourth Proportional to 230,402.75, 317,945.66 and 128,439.41

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Solution

The fourth proportional to 230,402.75, 317,945.66 and 128,439.41 is: 177,240.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,402.75 : 317,945.66 = 128,439.41 : x
  2. Step 2: Convert to fraction form
    230,402.75/317,945.66 = 128,439.41/x
  3. Step 3: Cross multiply
    230,402.75x = 317,945.66 × 128,439.41
  4. Step 4: Simplify right side
    230,402.75x = 40,836,750,750.54
  5. Step 5: Solve for x
    x = 40,836,750,750.54/230,402.75
  6. Step 6: Final answer
    x = 177,240.73

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1.5x scale

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.