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Finding the Fourth Proportional to 57,905.20, 86,728.20 and 44,714.80

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Solution

The fourth proportional to 57,905.20, 86,728.20 and 44,714.80 is: 66,972.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,905.20 : 86,728.20 = 44,714.80 : x
  2. Step 2: Convert to fraction form
    57,905.20/86,728.20 = 44,714.80/x
  3. Step 3: Cross multiply
    57,905.20x = 86,728.20 × 44,714.80
  4. Step 4: Simplify right side
    57,905.20x = 3,878,034,117.36
  5. Step 5: Solve for x
    x = 3,878,034,117.36/57,905.20
  6. Step 6: Final answer
    x = 66,972.12

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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.