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Finding the Fourth Proportional to 170,385.60, 255,578.40 and 86,404.80

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Solution

The fourth proportional to 170,385.60, 255,578.40 and 86,404.80 is: 129,607.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,385.60 : 255,578.40 = 86,404.80 : x
  2. Step 2: Convert to fraction form
    170,385.60/255,578.40 = 86,404.80/x
  3. Step 3: Cross multiply
    170,385.60x = 255,578.40 × 86,404.80
  4. Step 4: Simplify right side
    170,385.60x = 22,083,200,536.32
  5. Step 5: Solve for x
    x = 22,083,200,536.32/170,385.60
  6. Step 6: Final answer
    x = 129,607.20

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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.