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Finding the Fourth Proportional to 79,954.86, 119,910.39 and 30,031.10

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Solution

The fourth proportional to 79,954.86, 119,910.39 and 30,031.10 is: 45,038.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,954.86 : 119,910.39 = 30,031.10 : x
  2. Step 2: Convert to fraction form
    79,954.86/119,910.39 = 30,031.10/x
  3. Step 3: Cross multiply
    79,954.86x = 119,910.39 × 30,031.10
  4. Step 4: Simplify right side
    79,954.86x = 3,601,040,313.58
  5. Step 5: Solve for x
    x = 3,601,040,313.58/79,954.86
  6. Step 6: Final answer
    x = 45,038.42

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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.