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Finding the Fourth Proportional to 111,721.92, 167,704.32 and 45,207.84

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Solution

The fourth proportional to 111,721.92, 167,704.32 and 45,207.84 is: 67,860.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,721.92 : 167,704.32 = 45,207.84 : x
  2. Step 2: Convert to fraction form
    111,721.92/167,704.32 = 45,207.84/x
  3. Step 3: Cross multiply
    111,721.92x = 167,704.32 × 45,207.84
  4. Step 4: Simplify right side
    111,721.92x = 7,581,550,065.87
  5. Step 5: Solve for x
    x = 7,581,550,065.87/111,721.92
  6. Step 6: Final answer
    x = 67,860.90

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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.