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Finding the Fourth Proportional to 68,193.55, 102,287.90 and 20,806.73

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Solution

The fourth proportional to 68,193.55, 102,287.90 and 20,806.73 is: 31,209.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,193.55 : 102,287.90 = 20,806.73 : x
  2. Step 2: Convert to fraction form
    68,193.55/102,287.90 = 20,806.73/x
  3. Step 3: Cross multiply
    68,193.55x = 102,287.90 × 20,806.73
  4. Step 4: Simplify right side
    68,193.55x = 2,128,276,258.14
  5. Step 5: Solve for x
    x = 2,128,276,258.14/68,193.55
  6. Step 6: Final answer
    x = 31,209.35

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1.5x scale

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.