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Finding the Fourth Proportional to 67,729.60, 101,597.60 and 21,015.20

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Solution

The fourth proportional to 67,729.60, 101,597.60 and 21,015.20 is: 31,523.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,729.60 : 101,597.60 = 21,015.20 : x
  2. Step 2: Convert to fraction form
    67,729.60/101,597.60 = 21,015.20/x
  3. Step 3: Cross multiply
    67,729.60x = 101,597.60 × 21,015.20
  4. Step 4: Simplify right side
    67,729.60x = 2,135,093,883.52
  5. Step 5: Solve for x
    x = 2,135,093,883.52/67,729.60
  6. Step 6: Final answer
    x = 31,523.79

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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.