Home / 80,581.39-120,860.92-21,421.87

Finding the Fourth Proportional to 80,581.39, 120,860.92 and 21,421.87

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Solution

The fourth proportional to 80,581.39, 120,860.92 and 21,421.87 is: 32,129.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,581.39 : 120,860.92 = 21,421.87 : x
  2. Step 2: Convert to fraction form
    80,581.39/120,860.92 = 21,421.87/x
  3. Step 3: Cross multiply
    80,581.39x = 120,860.92 × 21,421.87
  4. Step 4: Simplify right side
    80,581.39x = 2,589,066,916.32
  5. Step 5: Solve for x
    x = 2,589,066,916.32/80,581.39
  6. Step 6: Final answer
    x = 32,129.84

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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.