Home / 80,619.84-120,956.64-28,042.56

Finding the Fourth Proportional to 80,619.84, 120,956.64 and 28,042.56

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Solution

The fourth proportional to 80,619.84, 120,956.64 and 28,042.56 is: 42,073.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,619.84 : 120,956.64 = 28,042.56 : x
  2. Step 2: Convert to fraction form
    80,619.84/120,956.64 = 28,042.56/x
  3. Step 3: Cross multiply
    80,619.84x = 120,956.64 × 28,042.56
  4. Step 4: Simplify right side
    80,619.84x = 3,391,933,834.60
  5. Step 5: Solve for x
    x = 3,391,933,834.60/80,619.84
  6. Step 6: Final answer
    x = 42,073.19

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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.