Home / 78,878.38-108,769.26-51,986.44

Finding the Fourth Proportional to 78,878.38, 108,769.26 and 51,986.44

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Solution

The fourth proportional to 78,878.38, 108,769.26 and 51,986.44 is: 71,686.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,878.38 : 108,769.26 = 51,986.44 : x
  2. Step 2: Convert to fraction form
    78,878.38/108,769.26 = 51,986.44/x
  3. Step 3: Cross multiply
    78,878.38x = 108,769.26 × 51,986.44
  4. Step 4: Simplify right side
    78,878.38x = 5,654,526,608.83
  5. Step 5: Solve for x
    x = 5,654,526,608.83/78,878.38
  6. Step 6: Final answer
    x = 71,686.65

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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.