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Finding the Fourth Proportional to 79,993.63, 119,994.09 and 20,835.28

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Solution

The fourth proportional to 79,993.63, 119,994.09 and 20,835.28 is: 31,253.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,993.63 : 119,994.09 = 20,835.28 : x
  2. Step 2: Convert to fraction form
    79,993.63/119,994.09 = 20,835.28/x
  3. Step 3: Cross multiply
    79,993.63x = 119,994.09 × 20,835.28
  4. Step 4: Simplify right side
    79,993.63x = 2,500,110,463.50
  5. Step 5: Solve for x
    x = 2,500,110,463.50/79,993.63
  6. Step 6: Final answer
    x = 31,253.87

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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.