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Finding the Fourth Proportional to 111,939.20, 167,907.78 and 45,363.50

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Solution

The fourth proportional to 111,939.20, 167,907.78 and 45,363.50 is: 68,044.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,939.20 : 167,907.78 = 45,363.50 : x
  2. Step 2: Convert to fraction form
    111,939.20/167,907.78 = 45,363.50/x
  3. Step 3: Cross multiply
    111,939.20x = 167,907.78 × 45,363.50
  4. Step 4: Simplify right side
    111,939.20x = 7,616,884,578.03
  5. Step 5: Solve for x
    x = 7,616,884,578.03/111,939.20
  6. Step 6: Final answer
    x = 68,044.84

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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.