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Finding the Fourth Proportional to 171,086.40, 256,921.20 and 121,514.40

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Solution

The fourth proportional to 171,086.40, 256,921.20 and 121,514.40 is: 182,478.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,086.40 : 256,921.20 = 121,514.40 : x
  2. Step 2: Convert to fraction form
    171,086.40/256,921.20 = 121,514.40/x
  3. Step 3: Cross multiply
    171,086.40x = 256,921.20 × 121,514.40
  4. Step 4: Simplify right side
    171,086.40x = 31,219,625,465.28
  5. Step 5: Solve for x
    x = 31,219,625,465.28/171,086.40
  6. Step 6: Final answer
    x = 182,478.71

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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.