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Finding the Fourth Proportional to 79,667.30, 109,936.90 and 43,856.40

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Solution

The fourth proportional to 79,667.30, 109,936.90 and 43,856.40 is: 60,519.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,667.30 : 109,936.90 = 43,856.40 : x
  2. Step 2: Convert to fraction form
    79,667.30/109,936.90 = 43,856.40/x
  3. Step 3: Cross multiply
    79,667.30x = 109,936.90 × 43,856.40
  4. Step 4: Simplify right side
    79,667.30x = 4,821,436,661.16
  5. Step 5: Solve for x
    x = 4,821,436,661.16/79,667.30
  6. Step 6: Final answer
    x = 60,519.64

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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.