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Finding the Fourth Proportional to 79,995.36, 120,018.96 and 27,405.30

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Solution

The fourth proportional to 79,995.36, 120,018.96 and 27,405.30 is: 41,116.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,995.36 : 120,018.96 = 27,405.30 : x
  2. Step 2: Convert to fraction form
    79,995.36/120,018.96 = 27,405.30/x
  3. Step 3: Cross multiply
    79,995.36x = 120,018.96 × 27,405.30
  4. Step 4: Simplify right side
    79,995.36x = 3,289,155,604.49
  5. Step 5: Solve for x
    x = 3,289,155,604.49/79,995.36
  6. Step 6: Final answer
    x = 41,116.83

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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.