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Finding the Fourth Proportional to 79,511.26, 109,659.80 and 53,975.64

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Solution

The fourth proportional to 79,511.26, 109,659.80 and 53,975.64 is: 74,441.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,511.26 : 109,659.80 = 53,975.64 : x
  2. Step 2: Convert to fraction form
    79,511.26/109,659.80 = 53,975.64/x
  3. Step 3: Cross multiply
    79,511.26x = 109,659.80 × 53,975.64
  4. Step 4: Simplify right side
    79,511.26x = 5,918,957,887.27
  5. Step 5: Solve for x
    x = 5,918,957,887.27/79,511.26
  6. Step 6: Final answer
    x = 74,441.76

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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.