Home / 80,911.04-121,357.92-28,321.52

Finding the Fourth Proportional to 80,911.04, 121,357.92 and 28,321.52

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Solution

The fourth proportional to 80,911.04, 121,357.92 and 28,321.52 is: 42,479.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,911.04 : 121,357.92 = 28,321.52 : x
  2. Step 2: Convert to fraction form
    80,911.04/121,357.92 = 28,321.52/x
  3. Step 3: Cross multiply
    80,911.04x = 121,357.92 × 28,321.52
  4. Step 4: Simplify right side
    80,911.04x = 3,437,040,758.44
  5. Step 5: Solve for x
    x = 3,437,040,758.44/80,911.04
  6. Step 6: Final answer
    x = 42,479.26

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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.