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Finding the Fourth Proportional to 79,220.42, 109,324.32 and 43,409.78

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Solution

The fourth proportional to 79,220.42, 109,324.32 and 43,409.78 is: 59,905.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,220.42 : 109,324.32 = 43,409.78 : x
  2. Step 2: Convert to fraction form
    79,220.42/109,324.32 = 43,409.78/x
  3. Step 3: Cross multiply
    79,220.42x = 109,324.32 × 43,409.78
  4. Step 4: Simplify right side
    79,220.42x = 4,745,744,679.85
  5. Step 5: Solve for x
    x = 4,745,744,679.85/79,220.42
  6. Step 6: Final answer
    x = 59,905.57

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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.