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Finding the Fourth Proportional to 73,270.60, 109,905.90 and 68,021.80

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Solution

The fourth proportional to 73,270.60, 109,905.90 and 68,021.80 is: 102,032.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,270.60 : 109,905.90 = 68,021.80 : x
  2. Step 2: Convert to fraction form
    73,270.60/109,905.90 = 68,021.80/x
  3. Step 3: Cross multiply
    73,270.60x = 109,905.90 × 68,021.80
  4. Step 4: Simplify right side
    73,270.60x = 7,475,997,148.62
  5. Step 5: Solve for x
    x = 7,475,997,148.62/73,270.60
  6. Step 6: Final answer
    x = 102,032.70

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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.