Home / 80,287.77-120,438.54-21,123.75

Finding the Fourth Proportional to 80,287.77, 120,438.54 and 21,123.75

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Solution

The fourth proportional to 80,287.77, 120,438.54 and 21,123.75 is: 31,687.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,287.77 : 120,438.54 = 21,123.75 : x
  2. Step 2: Convert to fraction form
    80,287.77/120,438.54 = 21,123.75/x
  3. Step 3: Cross multiply
    80,287.77x = 120,438.54 × 21,123.75
  4. Step 4: Simplify right side
    80,287.77x = 2,544,113,609.33
  5. Step 5: Solve for x
    x = 2,544,113,609.33/80,287.77
  6. Step 6: Final answer
    x = 31,687.44

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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.