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Finding the Fourth Proportional to 171,391.40, 257,087.10 and 115,404.20

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Solution

The fourth proportional to 171,391.40, 257,087.10 and 115,404.20 is: 173,106.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,391.40 : 257,087.10 = 115,404.20 : x
  2. Step 2: Convert to fraction form
    171,391.40/257,087.10 = 115,404.20/x
  3. Step 3: Cross multiply
    171,391.40x = 257,087.10 × 115,404.20
  4. Step 4: Simplify right side
    171,391.40x = 29,668,931,105.82
  5. Step 5: Solve for x
    x = 29,668,931,105.82/171,391.40
  6. Step 6: Final answer
    x = 173,106.30

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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.