Home / 80,519.16-120,778.74-21,359.46

Finding the Fourth Proportional to 80,519.16, 120,778.74 and 21,359.46

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Solution

The fourth proportional to 80,519.16, 120,778.74 and 21,359.46 is: 32,039.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,519.16 : 120,778.74 = 21,359.46 : x
  2. Step 2: Convert to fraction form
    80,519.16/120,778.74 = 21,359.46/x
  3. Step 3: Cross multiply
    80,519.16x = 120,778.74 × 21,359.46
  4. Step 4: Simplify right side
    80,519.16x = 2,579,768,665.88
  5. Step 5: Solve for x
    x = 2,579,768,665.88/80,519.16
  6. Step 6: Final answer
    x = 32,039.19

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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.