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Finding the Fourth Proportional to 79,689.81, 109,971.94 and 43,879.74

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Solution

The fourth proportional to 79,689.81, 109,971.94 and 43,879.74 is: 60,554.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,689.81 : 109,971.94 = 43,879.74 : x
  2. Step 2: Convert to fraction form
    79,689.81/109,971.94 = 43,879.74/x
  3. Step 3: Cross multiply
    79,689.81x = 109,971.94 × 43,879.74
  4. Step 4: Simplify right side
    79,689.81x = 4,825,540,134.50
  5. Step 5: Solve for x
    x = 4,825,540,134.50/79,689.81
  6. Step 6: Final answer
    x = 60,554.04

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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.