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Finding the Fourth Proportional to 170,932.55, 256,223.84 and 86,536.22

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Solution

The fourth proportional to 170,932.55, 256,223.84 and 86,536.22 is: 129,715.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,932.55 : 256,223.84 = 86,536.22 : x
  2. Step 2: Convert to fraction form
    170,932.55/256,223.84 = 86,536.22/x
  3. Step 3: Cross multiply
    170,932.55x = 256,223.84 × 86,536.22
  4. Step 4: Simplify right side
    170,932.55x = 22,172,640,873.68
  5. Step 5: Solve for x
    x = 22,172,640,873.68/170,932.55
  6. Step 6: Final answer
    x = 129,715.74

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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.