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Finding the Fourth Proportional to 79,447.52, 109,638.48 and 43,638.36

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Solution

The fourth proportional to 79,447.52, 109,638.48 and 43,638.36 is: 60,221.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,447.52 : 109,638.48 = 43,638.36 : x
  2. Step 2: Convert to fraction form
    79,447.52/109,638.48 = 43,638.36/x
  3. Step 3: Cross multiply
    79,447.52x = 109,638.48 × 43,638.36
  4. Step 4: Simplify right side
    79,447.52x = 4,784,443,460.09
  5. Step 5: Solve for x
    x = 4,784,443,460.09/79,447.52
  6. Step 6: Final answer
    x = 60,221.44

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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.