Home / 80,257.62-120,320.72-30,309.36

Finding the Fourth Proportional to 80,257.62, 120,320.72 and 30,309.36

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Solution

The fourth proportional to 80,257.62, 120,320.72 and 30,309.36 is: 45,439.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,257.62 : 120,320.72 = 30,309.36 : x
  2. Step 2: Convert to fraction form
    80,257.62/120,320.72 = 30,309.36/x
  3. Step 3: Cross multiply
    80,257.62x = 120,320.72 × 30,309.36
  4. Step 4: Simplify right side
    80,257.62x = 3,646,844,017.94
  5. Step 5: Solve for x
    x = 3,646,844,017.94/80,257.62
  6. Step 6: Final answer
    x = 45,439.22

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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.