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Finding the Fourth Proportional to 107,699.97, 161,197.77 and 79,229.35

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Solution

The fourth proportional to 107,699.97, 161,197.77 and 79,229.35 is: 118,584.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,699.97 : 161,197.77 = 79,229.35 : x
  2. Step 2: Convert to fraction form
    107,699.97/161,197.77 = 79,229.35/x
  3. Step 3: Cross multiply
    107,699.97x = 161,197.77 × 79,229.35
  4. Step 4: Simplify right side
    107,699.97x = 12,771,593,732.56
  5. Step 5: Solve for x
    x = 12,771,593,732.56/107,699.97
  6. Step 6: Final answer
    x = 118,584.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.