Home / 68,132.12-102,186-20,735.71

Finding the Fourth Proportional to 68,132.12, 102,186 and 20,735.71

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Solution

The fourth proportional to 68,132.12, 102,186 and 20,735.71 is: 31,099.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,132.12 : 102,186 = 20,735.71 : x
  2. Step 2: Convert to fraction form
    68,132.12/102,186 = 20,735.71/x
  3. Step 3: Cross multiply
    68,132.12x = 102,186 × 20,735.71
  4. Step 4: Simplify right side
    68,132.12x = 2,118,899,006.60
  5. Step 5: Solve for x
    x = 2,118,899,006.60/68,132.12
  6. Step 6: Final answer
    x = 31,099.86

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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.