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Finding the Fourth Proportional to 74,591.44, 111,859 and 21,986

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Solution

The fourth proportional to 74,591.44, 111,859 and 21,986 is: 32,970.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,591.44 : 111,859 = 21,986 : x
  2. Step 2: Convert to fraction form
    74,591.44/111,859 = 21,986/x
  3. Step 3: Cross multiply
    74,591.44x = 111,859 × 21,986
  4. Step 4: Simplify right side
    74,591.44x = 2,459,331,974
  5. Step 5: Solve for x
    x = 2,459,331,974/74,591.44
  6. Step 6: Final answer
    x = 32,970.70

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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.