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Finding the Fourth Proportional to 79,372.80, 109,531.04 and 43,563.42

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Solution

The fourth proportional to 79,372.80, 109,531.04 and 43,563.42 is: 60,115.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,372.80 : 109,531.04 = 43,563.42 : x
  2. Step 2: Convert to fraction form
    79,372.80/109,531.04 = 43,563.42/x
  3. Step 3: Cross multiply
    79,372.80x = 109,531.04 × 43,563.42
  4. Step 4: Simplify right side
    79,372.80x = 4,771,546,480.74
  5. Step 5: Solve for x
    x = 4,771,546,480.74/79,372.80
  6. Step 6: Final answer
    x = 60,115.64

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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.