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Finding the Fourth Proportional to 78,859.09, 108,815.97 and 44,871.90

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Solution

The fourth proportional to 78,859.09, 108,815.97 and 44,871.90 is: 61,917.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,859.09 : 108,815.97 = 44,871.90 : x
  2. Step 2: Convert to fraction form
    78,859.09/108,815.97 = 44,871.90/x
  3. Step 3: Cross multiply
    78,859.09x = 108,815.97 × 44,871.90
  4. Step 4: Simplify right side
    78,859.09x = 4,882,779,324.24
  5. Step 5: Solve for x
    x = 4,882,779,324.24/78,859.09
  6. Step 6: Final answer
    x = 61,917.77

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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.