Home / 80,891.52-121,399.38-55,531.50

Finding the Fourth Proportional to 80,891.52, 121,399.38 and 55,531.50

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Solution

The fourth proportional to 80,891.52, 121,399.38 and 55,531.50 is: 83,339.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,891.52 : 121,399.38 = 55,531.50 : x
  2. Step 2: Convert to fraction form
    80,891.52/121,399.38 = 55,531.50/x
  3. Step 3: Cross multiply
    80,891.52x = 121,399.38 × 55,531.50
  4. Step 4: Simplify right side
    80,891.52x = 6,741,489,670.47
  5. Step 5: Solve for x
    x = 6,741,489,670.47/80,891.52
  6. Step 6: Final answer
    x = 83,339.88

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1.5x scale

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.