Home / 121,378.20-182,067.30-77,200.80

Finding the Fourth Proportional to 121,378.20, 182,067.30 and 77,200.80

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Solution

The fourth proportional to 121,378.20, 182,067.30 and 77,200.80 is: 115,801.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,378.20 : 182,067.30 = 77,200.80 : x
  2. Step 2: Convert to fraction form
    121,378.20/182,067.30 = 77,200.80/x
  3. Step 3: Cross multiply
    121,378.20x = 182,067.30 × 77,200.80
  4. Step 4: Simplify right side
    121,378.20x = 14,055,741,213.84
  5. Step 5: Solve for x
    x = 14,055,741,213.84/121,378.20
  6. Step 6: Final answer
    x = 115,801.20

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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.