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Finding the Fourth Proportional to 83,940.60, 125,910.90 and 39,552.60

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Solution

The fourth proportional to 83,940.60, 125,910.90 and 39,552.60 is: 59,328.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,940.60 : 125,910.90 = 39,552.60 : x
  2. Step 2: Convert to fraction form
    83,940.60/125,910.90 = 39,552.60/x
  3. Step 3: Cross multiply
    83,940.60x = 125,910.90 × 39,552.60
  4. Step 4: Simplify right side
    83,940.60x = 4,980,103,463.34
  5. Step 5: Solve for x
    x = 4,980,103,463.34/83,940.60
  6. Step 6: Final answer
    x = 59,328.90

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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.