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Finding the Fourth Proportional to 61,077.65, 91,629.56 and 18,956.85

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Solution

The fourth proportional to 61,077.65, 91,629.56 and 18,956.85 is: 28,439.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,077.65 : 91,629.56 = 18,956.85 : x
  2. Step 2: Convert to fraction form
    61,077.65/91,629.56 = 18,956.85/x
  3. Step 3: Cross multiply
    61,077.65x = 91,629.56 × 18,956.85
  4. Step 4: Simplify right side
    61,077.65x = 1,737,007,729.70
  5. Step 5: Solve for x
    x = 1,737,007,729.70/61,077.65
  6. Step 6: Final answer
    x = 28,439.33

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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.