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Finding the Fourth Proportional to 230,336.96, 317,865.31 and 128,360.19

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Solution

The fourth proportional to 230,336.96, 317,865.31 and 128,360.19 is: 177,137.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,336.96 : 317,865.31 = 128,360.19 : x
  2. Step 2: Convert to fraction form
    230,336.96/317,865.31 = 128,360.19/x
  3. Step 3: Cross multiply
    230,336.96x = 317,865.31 × 128,360.19
  4. Step 4: Simplify right side
    230,336.96x = 40,801,251,586.01
  5. Step 5: Solve for x
    x = 40,801,251,586.01/230,336.96
  6. Step 6: Final answer
    x = 177,137.23

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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.