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Finding the Fourth Proportional to 79,212.94, 109,313.85 and 43,404.31

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Solution

The fourth proportional to 79,212.94, 109,313.85 and 43,404.31 is: 59,897.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,212.94 : 109,313.85 = 43,404.31 : x
  2. Step 2: Convert to fraction form
    79,212.94/109,313.85 = 43,404.31/x
  3. Step 3: Cross multiply
    79,212.94x = 109,313.85 × 43,404.31
  4. Step 4: Simplify right side
    79,212.94x = 4,744,691,917.21
  5. Step 5: Solve for x
    x = 4,744,691,917.21/79,212.94
  6. Step 6: Final answer
    x = 59,897.94

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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.