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Finding the Fourth Proportional to 79,405.75, 109,589.67 and 45,871.75

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Solution

The fourth proportional to 79,405.75, 109,589.67 and 45,871.75 is: 63,308.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,405.75 : 109,589.67 = 45,871.75 : x
  2. Step 2: Convert to fraction form
    79,405.75/109,589.67 = 45,871.75/x
  3. Step 3: Cross multiply
    79,405.75x = 109,589.67 × 45,871.75
  4. Step 4: Simplify right side
    79,405.75x = 5,027,069,944.82
  5. Step 5: Solve for x
    x = 5,027,069,944.82/79,405.75
  6. Step 6: Final answer
    x = 63,308.64

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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.