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Finding the Fourth Proportional to 74,199.64, 111,300.68 and 20,892.90

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Solution

The fourth proportional to 74,199.64, 111,300.68 and 20,892.90 is: 31,339.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,199.64 : 111,300.68 = 20,892.90 : x
  2. Step 2: Convert to fraction form
    74,199.64/111,300.68 = 20,892.90/x
  3. Step 3: Cross multiply
    74,199.64x = 111,300.68 × 20,892.90
  4. Step 4: Simplify right side
    74,199.64x = 2,325,394,255.42
  5. Step 5: Solve for x
    x = 2,325,394,255.42/74,199.64
  6. Step 6: Final answer
    x = 31,339.70

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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.