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Finding the Fourth Proportional to 68,125.71, 102,203.94 and 20,745.04

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Solution

The fourth proportional to 68,125.71, 102,203.94 and 20,745.04 is: 31,122.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,125.71 : 102,203.94 = 20,745.04 : x
  2. Step 2: Convert to fraction form
    68,125.71/102,203.94 = 20,745.04/x
  3. Step 3: Cross multiply
    68,125.71x = 102,203.94 × 20,745.04
  4. Step 4: Simplify right side
    68,125.71x = 2,120,224,823.46
  5. Step 5: Solve for x
    x = 2,120,224,823.46/68,125.71
  6. Step 6: Final answer
    x = 31,122.24

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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.