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Finding the Fourth Proportional to 174,315.20, 261,645.60 and 85,668.80

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Solution

The fourth proportional to 174,315.20, 261,645.60 and 85,668.80 is: 128,588.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,315.20 : 261,645.60 = 85,668.80 : x
  2. Step 2: Convert to fraction form
    174,315.20/261,645.60 = 85,668.80/x
  3. Step 3: Cross multiply
    174,315.20x = 261,645.60 × 85,668.80
  4. Step 4: Simplify right side
    174,315.20x = 22,414,864,577.28
  5. Step 5: Solve for x
    x = 22,414,864,577.28/174,315.20
  6. Step 6: Final answer
    x = 128,588.12

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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.