Home / 67,171.15-100,721.94-19,780.07

Finding the Fourth Proportional to 67,171.15, 100,721.94 and 19,780.07

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Solution

The fourth proportional to 67,171.15, 100,721.94 and 19,780.07 is: 29,659.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,171.15 : 100,721.94 = 19,780.07 : x
  2. Step 2: Convert to fraction form
    67,171.15/100,721.94 = 19,780.07/x
  3. Step 3: Cross multiply
    67,171.15x = 100,721.94 × 19,780.07
  4. Step 4: Simplify right side
    67,171.15x = 1,992,287,023.74
  5. Step 5: Solve for x
    x = 1,992,287,023.74/67,171.15
  6. Step 6: Final answer
    x = 29,659.86

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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.