Home / 80,739.82-121,100.32-21,580.12

Finding the Fourth Proportional to 80,739.82, 121,100.32 and 21,580.12

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Solution

The fourth proportional to 80,739.82, 121,100.32 and 21,580.12 is: 32,367.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,739.82 : 121,100.32 = 21,580.12 : x
  2. Step 2: Convert to fraction form
    80,739.82/121,100.32 = 21,580.12/x
  3. Step 3: Cross multiply
    80,739.82x = 121,100.32 × 21,580.12
  4. Step 4: Simplify right side
    80,739.82x = 2,613,359,437.64
  5. Step 5: Solve for x
    x = 2,613,359,437.64/80,739.82
  6. Step 6: Final answer
    x = 32,367.66

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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.