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Finding the Fourth Proportional to 71,336.60, 98,440.80 and 39,503.60

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Solution

The fourth proportional to 71,336.60, 98,440.80 and 39,503.60 is: 54,512.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,336.60 : 98,440.80 = 39,503.60 : x
  2. Step 2: Convert to fraction form
    71,336.60/98,440.80 = 39,503.60/x
  3. Step 3: Cross multiply
    71,336.60x = 98,440.80 × 39,503.60
  4. Step 4: Simplify right side
    71,336.60x = 3,888,765,986.88
  5. Step 5: Solve for x
    x = 3,888,765,986.88/71,336.60
  6. Step 6: Final answer
    x = 54,512.91

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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.