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Finding the Fourth Proportional to 86,704.62, 129,851.89 and 73,910.67

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Solution

The fourth proportional to 86,704.62, 129,851.89 and 73,910.67 is: 110,691.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,704.62 : 129,851.89 = 73,910.67 : x
  2. Step 2: Convert to fraction form
    86,704.62/129,851.89 = 73,910.67/x
  3. Step 3: Cross multiply
    86,704.62x = 129,851.89 × 73,910.67
  4. Step 4: Simplify right side
    86,704.62x = 9,597,440,190.67
  5. Step 5: Solve for x
    x = 9,597,440,190.67/86,704.62
  6. Step 6: Final answer
    x = 110,691.22

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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.