Home / 80,509.23-120,782.82-79,170.39

Finding the Fourth Proportional to 80,509.23, 120,782.82 and 79,170.39

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Solution

The fourth proportional to 80,509.23, 120,782.82 and 79,170.39 is: 118,774.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,509.23 : 120,782.82 = 79,170.39 : x
  2. Step 2: Convert to fraction form
    80,509.23/120,782.82 = 79,170.39/x
  3. Step 3: Cross multiply
    80,509.23x = 120,782.82 × 79,170.39
  4. Step 4: Simplify right side
    80,509.23x = 9,562,422,964.70
  5. Step 5: Solve for x
    x = 9,562,422,964.70/80,509.23
  6. Step 6: Final answer
    x = 118,774.24

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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.