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Finding the Fourth Proportional to 371,739.72, 557,610.39 and 91,257.78

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Solution

The fourth proportional to 371,739.72, 557,610.39 and 91,257.78 is: 136,886.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,739.72 : 557,610.39 = 91,257.78 : x
  2. Step 2: Convert to fraction form
    371,739.72/557,610.39 = 91,257.78/x
  3. Step 3: Cross multiply
    371,739.72x = 557,610.39 × 91,257.78
  4. Step 4: Simplify right side
    371,739.72x = 50,886,286,296.33
  5. Step 5: Solve for x
    x = 50,886,286,296.33/371,739.72
  6. Step 6: Final answer
    x = 136,886.87

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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.