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Finding the Fourth Proportional to 71,611.89, 107,380.89 and 49,156.86

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Solution

The fourth proportional to 71,611.89, 107,380.89 and 49,156.86 is: 73,709.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,611.89 : 107,380.89 = 49,156.86 : x
  2. Step 2: Convert to fraction form
    71,611.89/107,380.89 = 49,156.86/x
  3. Step 3: Cross multiply
    71,611.89x = 107,380.89 × 49,156.86
  4. Step 4: Simplify right side
    71,611.89x = 5,278,507,376.41
  5. Step 5: Solve for x
    x = 5,278,507,376.41/71,611.89
  6. Step 6: Final answer
    x = 73,709.93

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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.