Home / 81,456.48-122,108.99-31,569.12

Finding the Fourth Proportional to 81,456.48, 122,108.99 and 31,569.12

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Solution

The fourth proportional to 81,456.48, 122,108.99 and 31,569.12 is: 47,324.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,456.48 : 122,108.99 = 31,569.12 : x
  2. Step 2: Convert to fraction form
    81,456.48/122,108.99 = 31,569.12/x
  3. Step 3: Cross multiply
    81,456.48x = 122,108.99 × 31,569.12
  4. Step 4: Simplify right side
    81,456.48x = 3,854,873,200.54
  5. Step 5: Solve for x
    x = 3,854,873,200.54/81,456.48
  6. Step 6: Final answer
    x = 47,324.33

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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.