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Finding the Fourth Proportional to 67,108.59, 100,665.95 and 47,474.78

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Solution

The fourth proportional to 67,108.59, 100,665.95 and 47,474.78 is: 71,214.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,108.59 : 100,665.95 = 47,474.78 : x
  2. Step 2: Convert to fraction form
    67,108.59/100,665.95 = 47,474.78/x
  3. Step 3: Cross multiply
    67,108.59x = 100,665.95 × 47,474.78
  4. Step 4: Simplify right side
    67,108.59x = 4,779,093,089.04
  5. Step 5: Solve for x
    x = 4,779,093,089.04/67,108.59
  6. Step 6: Final answer
    x = 71,214.33

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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.