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Finding the Fourth Proportional to 66,370.60, 99,555.90 and 21,998.80

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Solution

The fourth proportional to 66,370.60, 99,555.90 and 21,998.80 is: 32,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,370.60 : 99,555.90 = 21,998.80 : x
  2. Step 2: Convert to fraction form
    66,370.60/99,555.90 = 21,998.80/x
  3. Step 3: Cross multiply
    66,370.60x = 99,555.90 × 21,998.80
  4. Step 4: Simplify right side
    66,370.60x = 2,190,110,332.92
  5. Step 5: Solve for x
    x = 2,190,110,332.92/66,370.60
  6. Step 6: Final answer
    x = 32,998.20

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Similar ratio
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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.