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Finding the Fourth Proportional to 79,872.89, 110,175.75 and 51,182.90

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Solution

The fourth proportional to 79,872.89, 110,175.75 and 51,182.90 is: 70,601.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,872.89 : 110,175.75 = 51,182.90 : x
  2. Step 2: Convert to fraction form
    79,872.89/110,175.75 = 51,182.90/x
  3. Step 3: Cross multiply
    79,872.89x = 110,175.75 × 51,182.90
  4. Step 4: Simplify right side
    79,872.89x = 5,639,113,843.80
  5. Step 5: Solve for x
    x = 5,639,113,843.80/79,872.89
  6. Step 6: Final answer
    x = 70,601.10

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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.