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Finding the Fourth Proportional to 57,861.60, 86,776.20 and 18,430.80

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Solution

The fourth proportional to 57,861.60, 86,776.20 and 18,430.80 is: 27,641.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,861.60 : 86,776.20 = 18,430.80 : x
  2. Step 2: Convert to fraction form
    57,861.60/86,776.20 = 18,430.80/x
  3. Step 3: Cross multiply
    57,861.60x = 86,776.20 × 18,430.80
  4. Step 4: Simplify right side
    57,861.60x = 1,599,354,786.96
  5. Step 5: Solve for x
    x = 1,599,354,786.96/57,861.60
  6. Step 6: Final answer
    x = 27,641.04

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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.