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Finding the Fourth Proportional to 79,689.94, 109,972.11 and 43,879.86

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Solution

The fourth proportional to 79,689.94, 109,972.11 and 43,879.86 is: 60,554.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,689.94 : 109,972.11 = 43,879.86 : x
  2. Step 2: Convert to fraction form
    79,689.94/109,972.11 = 43,879.86/x
  3. Step 3: Cross multiply
    79,689.94x = 109,972.11 × 43,879.86
  4. Step 4: Simplify right side
    79,689.94x = 4,825,560,955.25
  5. Step 5: Solve for x
    x = 4,825,560,955.25/79,689.94
  6. Step 6: Final answer
    x = 60,554.21

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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.