Home / 80,721.11-121,076.76-30,110.38

Finding the Fourth Proportional to 80,721.11, 121,076.76 and 30,110.38

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Solution

The fourth proportional to 80,721.11, 121,076.76 and 30,110.38 is: 45,163.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,721.11 : 121,076.76 = 30,110.38 : x
  2. Step 2: Convert to fraction form
    80,721.11/121,076.76 = 30,110.38/x
  3. Step 3: Cross multiply
    80,721.11x = 121,076.76 × 30,110.38
  4. Step 4: Simplify right side
    80,721.11x = 3,645,666,647.39
  5. Step 5: Solve for x
    x = 3,645,666,647.39/80,721.11
  6. Step 6: Final answer
    x = 45,163.73

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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.