Home / 80,400.51-120,606.53-21,235.59

Finding the Fourth Proportional to 80,400.51, 120,606.53 and 21,235.59

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Solution

The fourth proportional to 80,400.51, 120,606.53 and 21,235.59 is: 31,854.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,400.51 : 120,606.53 = 21,235.59 : x
  2. Step 2: Convert to fraction form
    80,400.51/120,606.53 = 21,235.59/x
  3. Step 3: Cross multiply
    80,400.51x = 120,606.53 × 21,235.59
  4. Step 4: Simplify right side
    80,400.51x = 2,561,150,716.22
  5. Step 5: Solve for x
    x = 2,561,150,716.22/80,400.51
  6. Step 6: Final answer
    x = 31,854.91

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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.