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Finding the Fourth Proportional to 68,169.75, 102,258.27 and 21,426.27

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Solution

The fourth proportional to 68,169.75, 102,258.27 and 21,426.27 is: 32,140.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,169.75 : 102,258.27 = 21,426.27 : x
  2. Step 2: Convert to fraction form
    68,169.75/102,258.27 = 21,426.27/x
  3. Step 3: Cross multiply
    68,169.75x = 102,258.27 × 21,426.27
  4. Step 4: Simplify right side
    68,169.75x = 2,191,013,302.75
  5. Step 5: Solve for x
    x = 2,191,013,302.75/68,169.75
  6. Step 6: Final answer
    x = 32,140.55

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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.