Home / 80,708.75-121,063.73-28,118.15

Finding the Fourth Proportional to 80,708.75, 121,063.73 and 28,118.15

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Solution

The fourth proportional to 80,708.75, 121,063.73 and 28,118.15 is: 42,177.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,708.75 : 121,063.73 = 28,118.15 : x
  2. Step 2: Convert to fraction form
    80,708.75/121,063.73 = 28,118.15/x
  3. Step 3: Cross multiply
    80,708.75x = 121,063.73 × 28,118.15
  4. Step 4: Simplify right side
    80,708.75x = 3,404,088,119.70
  5. Step 5: Solve for x
    x = 3,404,088,119.70/80,708.75
  6. Step 6: Final answer
    x = 42,177.44

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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.