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Finding the Fourth Proportional to 71,268.56, 106,920.12 and 21,348.56

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Solution

The fourth proportional to 71,268.56, 106,920.12 and 21,348.56 is: 32,028.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,268.56 : 106,920.12 = 21,348.56 : x
  2. Step 2: Convert to fraction form
    71,268.56/106,920.12 = 21,348.56/x
  3. Step 3: Cross multiply
    71,268.56x = 106,920.12 × 21,348.56
  4. Step 4: Simplify right side
    71,268.56x = 2,282,590,597.03
  5. Step 5: Solve for x
    x = 2,282,590,597.03/71,268.56
  6. Step 6: Final answer
    x = 32,028.02

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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.