Home / 71,909.06-107,863.54-19,318.55

Finding the Fourth Proportional to 71,909.06, 107,863.54 and 19,318.55

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Solution

The fourth proportional to 71,909.06, 107,863.54 and 19,318.55 is: 28,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,909.06 : 107,863.54 = 19,318.55 : x
  2. Step 2: Convert to fraction form
    71,909.06/107,863.54 = 19,318.55/x
  3. Step 3: Cross multiply
    71,909.06x = 107,863.54 × 19,318.55
  4. Step 4: Simplify right side
    71,909.06x = 2,083,766,727.57
  5. Step 5: Solve for x
    x = 2,083,766,727.57/71,909.06
  6. Step 6: Final answer
    x = 28,977.80

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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.