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Finding the Fourth Proportional to 79,589.44, 109,832.64 and 43,780

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Solution

The fourth proportional to 79,589.44, 109,832.64 and 43,780 is: 60,415.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,589.44 : 109,832.64 = 43,780 : x
  2. Step 2: Convert to fraction form
    79,589.44/109,832.64 = 43,780/x
  3. Step 3: Cross multiply
    79,589.44x = 109,832.64 × 43,780
  4. Step 4: Simplify right side
    79,589.44x = 4,808,472,979.20
  5. Step 5: Solve for x
    x = 4,808,472,979.20/79,589.44
  6. Step 6: Final answer
    x = 60,415.97

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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.