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Finding the Fourth Proportional to 79,768.80, 110,120.31 and 54,406.89

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Solution

The fourth proportional to 79,768.80, 110,120.31 and 54,406.89 is: 75,108.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,768.80 : 110,120.31 = 54,406.89 : x
  2. Step 2: Convert to fraction form
    79,768.80/110,120.31 = 54,406.89/x
  3. Step 3: Cross multiply
    79,768.80x = 110,120.31 × 54,406.89
  4. Step 4: Simplify right side
    79,768.80x = 5,991,303,592.94
  5. Step 5: Solve for x
    x = 5,991,303,592.94/79,768.80
  6. Step 6: Final answer
    x = 75,108.36

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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.