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Finding the Fourth Proportional to 56,709.85, 78,255.57 and 33,738.40

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Solution

The fourth proportional to 56,709.85, 78,255.57 and 33,738.40 is: 46,556.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,709.85 : 78,255.57 = 33,738.40 : x
  2. Step 2: Convert to fraction form
    56,709.85/78,255.57 = 33,738.40/x
  3. Step 3: Cross multiply
    56,709.85x = 78,255.57 × 33,738.40
  4. Step 4: Simplify right side
    56,709.85x = 2,640,217,537.35
  5. Step 5: Solve for x
    x = 2,640,217,537.35/56,709.85
  6. Step 6: Final answer
    x = 46,556.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.