Home / 80,890.82-121,159.44-66,691.32

Finding the Fourth Proportional to 80,890.82, 121,159.44 and 66,691.32

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Solution

The fourth proportional to 80,890.82, 121,159.44 and 66,691.32 is: 99,891.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,890.82 : 121,159.44 = 66,691.32 : x
  2. Step 2: Convert to fraction form
    80,890.82/121,159.44 = 66,691.32/x
  3. Step 3: Cross multiply
    80,890.82x = 121,159.44 × 66,691.32
  4. Step 4: Simplify right side
    80,890.82x = 8,080,282,984.06
  5. Step 5: Solve for x
    x = 8,080,282,984.06/80,890.82
  6. Step 6: Final answer
    x = 99,891.23

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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.