Home / 68,731.15-103,112.85-21,343.79

Finding the Fourth Proportional to 68,731.15, 103,112.85 and 21,343.79

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Solution

The fourth proportional to 68,731.15, 103,112.85 and 21,343.79 is: 32,020.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,731.15 : 103,112.85 = 21,343.79 : x
  2. Step 2: Convert to fraction form
    68,731.15/103,112.85 = 21,343.79/x
  3. Step 3: Cross multiply
    68,731.15x = 103,112.85 × 21,343.79
  4. Step 4: Simplify right side
    68,731.15x = 2,200,819,016.70
  5. Step 5: Solve for x
    x = 2,200,819,016.70/68,731.15
  6. Step 6: Final answer
    x = 32,020.69

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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.