Home / 81,278.96-121,922.52-25,879.28

Finding the Fourth Proportional to 81,278.96, 121,922.52 and 25,879.28

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Solution

The fourth proportional to 81,278.96, 121,922.52 and 25,879.28 is: 38,820.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,278.96 : 121,922.52 = 25,879.28 : x
  2. Step 2: Convert to fraction form
    81,278.96/121,922.52 = 25,879.28/x
  3. Step 3: Cross multiply
    81,278.96x = 121,922.52 × 25,879.28
  4. Step 4: Simplify right side
    81,278.96x = 3,155,267,033.39
  5. Step 5: Solve for x
    x = 3,155,267,033.39/81,278.96
  6. Step 6: Final answer
    x = 38,820.22

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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.