Home / 80,083.38-120,116.87-20,911.37

Finding the Fourth Proportional to 80,083.38, 120,116.87 and 20,911.37

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Solution

The fourth proportional to 80,083.38, 120,116.87 and 20,911.37 is: 31,364.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,083.38 : 120,116.87 = 20,911.37 : x
  2. Step 2: Convert to fraction form
    80,083.38/120,116.87 = 20,911.37/x
  3. Step 3: Cross multiply
    80,083.38x = 120,116.87 × 20,911.37
  4. Step 4: Simplify right side
    80,083.38x = 2,511,807,802.71
  5. Step 5: Solve for x
    x = 2,511,807,802.71/80,083.38
  6. Step 6: Final answer
    x = 31,364.91

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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.