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Finding the Fourth Proportional to 79,610.84, 109,800.76 and 49,379.21

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Solution

The fourth proportional to 79,610.84, 109,800.76 and 49,379.21 is: 68,104.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,610.84 : 109,800.76 = 49,379.21 : x
  2. Step 2: Convert to fraction form
    79,610.84/109,800.76 = 49,379.21/x
  3. Step 3: Cross multiply
    79,610.84x = 109,800.76 × 49,379.21
  4. Step 4: Simplify right side
    79,610.84x = 5,421,874,786.20
  5. Step 5: Solve for x
    x = 5,421,874,786.20/79,610.84
  6. Step 6: Final answer
    x = 68,104.73

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1.5x scale

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.