Home / 80,788.47-121,128.03-28,169.25

Finding the Fourth Proportional to 80,788.47, 121,128.03 and 28,169.25

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Solution

The fourth proportional to 80,788.47, 121,128.03 and 28,169.25 is: 42,234.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,788.47 : 121,128.03 = 28,169.25 : x
  2. Step 2: Convert to fraction form
    80,788.47/121,128.03 = 28,169.25/x
  3. Step 3: Cross multiply
    80,788.47x = 121,128.03 × 28,169.25
  4. Step 4: Simplify right side
    80,788.47x = 3,412,085,759.08
  5. Step 5: Solve for x
    x = 3,412,085,759.08/80,788.47
  6. Step 6: Final answer
    x = 42,234.81

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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.