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Finding the Fourth Proportional to 79,217.78, 109,319.90 and 43,407.70

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Solution

The fourth proportional to 79,217.78, 109,319.90 and 43,407.70 is: 59,902.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,217.78 : 109,319.90 = 43,407.70 : x
  2. Step 2: Convert to fraction form
    79,217.78/109,319.90 = 43,407.70/x
  3. Step 3: Cross multiply
    79,217.78x = 109,319.90 × 43,407.70
  4. Step 4: Simplify right side
    79,217.78x = 4,745,324,932.89
  5. Step 5: Solve for x
    x = 4,745,324,932.89/79,217.78
  6. Step 6: Final answer
    x = 59,902.27

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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.