Home / 78,080.20-117,121.27-27,480.74

Finding the Fourth Proportional to 78,080.20, 117,121.27 and 27,480.74

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Solution

The fourth proportional to 78,080.20, 117,121.27 and 27,480.74 is: 41,221.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,080.20 : 117,121.27 = 27,480.74 : x
  2. Step 2: Convert to fraction form
    78,080.20/117,121.27 = 27,480.74/x
  3. Step 3: Cross multiply
    78,080.20x = 117,121.27 × 27,480.74
  4. Step 4: Simplify right side
    78,080.20x = 3,218,579,169.34
  5. Step 5: Solve for x
    x = 3,218,579,169.34/78,080.20
  6. Step 6: Final answer
    x = 41,221.45

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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.