Home / 142,992,719.82-197,324,142.32-81,111,729.78

Finding the Fourth Proportional to 142,992,719.82, 197,324,142.32 and 81,111,729.78

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Solution

The fourth proportional to 142,992,719.82, 197,324,142.32 and 81,111,729.78 is: 111,930,890.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,992,719.82 : 197,324,142.32 = 81,111,729.78 : x
  2. Step 2: Convert to fraction form
    142,992,719.82/197,324,142.32 = 81,111,729.78/x
  3. Step 3: Cross multiply
    142,992,719.82x = 197,324,142.32 × 81,111,729.78
  4. Step 4: Simplify right side
    142,992,719.82x = 16,005,302,511,132,882
  5. Step 5: Solve for x
    x = 16,005,302,511,132,882/142,992,719.82
  6. Step 6: Final answer
    x = 111,930,890.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.