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Finding the Fourth Proportional to 171,919.80, 257,879.70 and 153,840.60

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Solution

The fourth proportional to 171,919.80, 257,879.70 and 153,840.60 is: 230,760.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,919.80 : 257,879.70 = 153,840.60 : x
  2. Step 2: Convert to fraction form
    171,919.80/257,879.70 = 153,840.60/x
  3. Step 3: Cross multiply
    171,919.80x = 257,879.70 × 153,840.60
  4. Step 4: Simplify right side
    171,919.80x = 39,672,367,775.82
  5. Step 5: Solve for x
    x = 39,672,367,775.82/171,919.80
  6. Step 6: Final answer
    x = 230,760.90

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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.