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Finding the Fourth Proportional to 57,886.70, 86,700.45 and 47,518.70

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Solution

The fourth proportional to 57,886.70, 86,700.45 and 47,518.70 is: 71,171.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,886.70 : 86,700.45 = 47,518.70 : x
  2. Step 2: Convert to fraction form
    57,886.70/86,700.45 = 47,518.70/x
  3. Step 3: Cross multiply
    57,886.70x = 86,700.45 × 47,518.70
  4. Step 4: Simplify right side
    57,886.70x = 4,119,892,673.42
  5. Step 5: Solve for x
    x = 4,119,892,673.42/57,886.70
  6. Step 6: Final answer
    x = 71,171.66

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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.