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Finding the Fourth Proportional to 79,722.54, 109,220.42 and 76,733.10

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Solution

The fourth proportional to 79,722.54, 109,220.42 and 76,733.10 is: 105,124.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,722.54 : 109,220.42 = 76,733.10 : x
  2. Step 2: Convert to fraction form
    79,722.54/109,220.42 = 76,733.10/x
  3. Step 3: Cross multiply
    79,722.54x = 109,220.42 × 76,733.10
  4. Step 4: Simplify right side
    79,722.54x = 8,380,821,026.24
  5. Step 5: Solve for x
    x = 8,380,821,026.24/79,722.54
  6. Step 6: Final answer
    x = 105,124.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.