Home / 68,720.92-103,102.85-20,691.43

Finding the Fourth Proportional to 68,720.92, 103,102.85 and 20,691.43

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Solution

The fourth proportional to 68,720.92, 103,102.85 and 20,691.43 is: 31,043.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,720.92 : 103,102.85 = 20,691.43 : x
  2. Step 2: Convert to fraction form
    68,720.92/103,102.85 = 20,691.43/x
  3. Step 3: Cross multiply
    68,720.92x = 103,102.85 × 20,691.43
  4. Step 4: Simplify right side
    68,720.92x = 2,133,345,506.59
  5. Step 5: Solve for x
    x = 2,133,345,506.59/68,720.92
  6. Step 6: Final answer
    x = 31,043.61

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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.