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Finding the Fourth Proportional to 57,068.40, 85,672.80 and 36,008.40

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Solution

The fourth proportional to 57,068.40, 85,672.80 and 36,008.40 is: 54,056.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,068.40 : 85,672.80 = 36,008.40 : x
  2. Step 2: Convert to fraction form
    57,068.40/85,672.80 = 36,008.40/x
  3. Step 3: Cross multiply
    57,068.40x = 85,672.80 × 36,008.40
  4. Step 4: Simplify right side
    57,068.40x = 3,084,940,451.52
  5. Step 5: Solve for x
    x = 3,084,940,451.52/57,068.40
  6. Step 6: Final answer
    x = 54,056.89

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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.