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Finding the Fourth Proportional to 56,611.80, 78,128.64 and 33,951.65

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Solution

The fourth proportional to 56,611.80, 78,128.64 and 33,951.65 is: 46,855.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,611.80 : 78,128.64 = 33,951.65 : x
  2. Step 2: Convert to fraction form
    56,611.80/78,128.64 = 33,951.65/x
  3. Step 3: Cross multiply
    56,611.80x = 78,128.64 × 33,951.65
  4. Step 4: Simplify right side
    56,611.80x = 2,652,595,849.61
  5. Step 5: Solve for x
    x = 2,652,595,849.61/56,611.80
  6. Step 6: Final answer
    x = 46,855.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.