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Finding the Fourth Proportional to 79,769.80, 110,121.69 and 54,407.89

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Solution

The fourth proportional to 79,769.80, 110,121.69 and 54,407.89 is: 75,109.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,769.80 : 110,121.69 = 54,407.89 : x
  2. Step 2: Convert to fraction form
    79,769.80/110,121.69 = 54,407.89/x
  3. Step 3: Cross multiply
    79,769.80x = 110,121.69 × 54,407.89
  4. Step 4: Simplify right side
    79,769.80x = 5,991,488,796.13
  5. Step 5: Solve for x
    x = 5,991,488,796.13/79,769.80
  6. Step 6: Final answer
    x = 75,109.74

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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.