Home / 81,556.31-122,345.87-25,400.49

Finding the Fourth Proportional to 81,556.31, 122,345.87 and 25,400.49

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Solution

The fourth proportional to 81,556.31, 122,345.87 and 25,400.49 is: 38,104.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,556.31 : 122,345.87 = 25,400.49 : x
  2. Step 2: Convert to fraction form
    81,556.31/122,345.87 = 25,400.49/x
  3. Step 3: Cross multiply
    81,556.31x = 122,345.87 × 25,400.49
  4. Step 4: Simplify right side
    81,556.31x = 3,107,644,920.47
  5. Step 5: Solve for x
    x = 3,107,644,920.47/81,556.31
  6. Step 6: Final answer
    x = 38,104.29

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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.