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Finding the Fourth Proportional to 79,520.99, 109,739.70 and 43,222.77

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Solution

The fourth proportional to 79,520.99, 109,739.70 and 43,222.77 is: 59,647.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,520.99 : 109,739.70 = 43,222.77 : x
  2. Step 2: Convert to fraction form
    79,520.99/109,739.70 = 43,222.77/x
  3. Step 3: Cross multiply
    79,520.99x = 109,739.70 × 43,222.77
  4. Step 4: Simplify right side
    79,520.99x = 4,743,253,812.97
  5. Step 5: Solve for x
    x = 4,743,253,812.97/79,520.99
  6. Step 6: Final answer
    x = 59,647.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.