Home / 80,868.66-121,286.26-21,690.25

Finding the Fourth Proportional to 80,868.66, 121,286.26 and 21,690.25

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Solution

The fourth proportional to 80,868.66, 121,286.26 and 21,690.25 is: 32,530.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,868.66 : 121,286.26 = 21,690.25 : x
  2. Step 2: Convert to fraction form
    80,868.66/121,286.26 = 21,690.25/x
  3. Step 3: Cross multiply
    80,868.66x = 121,286.26 × 21,690.25
  4. Step 4: Simplify right side
    80,868.66x = 2,630,729,300.97
  5. Step 5: Solve for x
    x = 2,630,729,300.97/80,868.66
  6. Step 6: Final answer
    x = 32,530.89

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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.