Home / 68,129.22-102,209.20-20,748.54

Finding the Fourth Proportional to 68,129.22, 102,209.20 and 20,748.54

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Solution

The fourth proportional to 68,129.22, 102,209.20 and 20,748.54 is: 31,127.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,129.22 : 102,209.20 = 20,748.54 : x
  2. Step 2: Convert to fraction form
    68,129.22/102,209.20 = 20,748.54/x
  3. Step 3: Cross multiply
    68,129.22x = 102,209.20 × 20,748.54
  4. Step 4: Simplify right side
    68,129.22x = 2,120,691,674.57
  5. Step 5: Solve for x
    x = 2,120,691,674.57/68,129.22
  6. Step 6: Final answer
    x = 31,127.49

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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.