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Finding the Fourth Proportional to 74,097.60, 111,142.44 and 20,793.20

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Solution

The fourth proportional to 74,097.60, 111,142.44 and 20,793.20 is: 31,188.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,097.60 : 111,142.44 = 20,793.20 : x
  2. Step 2: Convert to fraction form
    74,097.60/111,142.44 = 20,793.20/x
  3. Step 3: Cross multiply
    74,097.60x = 111,142.44 × 20,793.20
  4. Step 4: Simplify right side
    74,097.60x = 2,311,006,983.41
  5. Step 5: Solve for x
    x = 2,311,006,983.41/74,097.60
  6. Step 6: Final answer
    x = 31,188.69

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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.