Home / 81,211.84-121,822.32-30,610.24

Finding the Fourth Proportional to 81,211.84, 121,822.32 and 30,610.24

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Solution

The fourth proportional to 81,211.84, 121,822.32 and 30,610.24 is: 45,917.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,211.84 : 121,822.32 = 30,610.24 : x
  2. Step 2: Convert to fraction form
    81,211.84/121,822.32 = 30,610.24/x
  3. Step 3: Cross multiply
    81,211.84x = 121,822.32 × 30,610.24
  4. Step 4: Simplify right side
    81,211.84x = 3,729,010,452.56
  5. Step 5: Solve for x
    x = 3,729,010,452.56/81,211.84
  6. Step 6: Final answer
    x = 45,917.08

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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.