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Finding the Fourth Proportional to 79,431.76, 109,616 and 43,624.12

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Solution

The fourth proportional to 79,431.76, 109,616 and 43,624.12 is: 60,201.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,431.76 : 109,616 = 43,624.12 : x
  2. Step 2: Convert to fraction form
    79,431.76/109,616 = 43,624.12/x
  3. Step 3: Cross multiply
    79,431.76x = 109,616 × 43,624.12
  4. Step 4: Simplify right side
    79,431.76x = 4,781,901,537.92
  5. Step 5: Solve for x
    x = 4,781,901,537.92/79,431.76
  6. Step 6: Final answer
    x = 60,201.38

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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.