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Finding the Fourth Proportional to 74,519.89, 111,779.82 and 19,115.89

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Solution

The fourth proportional to 74,519.89, 111,779.82 and 19,115.89 is: 28,673.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,519.89 : 111,779.82 = 19,115.89 : x
  2. Step 2: Convert to fraction form
    74,519.89/111,779.82 = 19,115.89/x
  3. Step 3: Cross multiply
    74,519.89x = 111,779.82 × 19,115.89
  4. Step 4: Simplify right side
    74,519.89x = 2,136,770,743.34
  5. Step 5: Solve for x
    x = 2,136,770,743.34/74,519.89
  6. Step 6: Final answer
    x = 28,673.83

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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.