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Finding the Fourth Proportional to 72,759.72, 100,397.36 and 40,936.44

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Solution

The fourth proportional to 72,759.72, 100,397.36 and 40,936.44 is: 56,486.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,759.72 : 100,397.36 = 40,936.44 : x
  2. Step 2: Convert to fraction form
    72,759.72/100,397.36 = 40,936.44/x
  3. Step 3: Cross multiply
    72,759.72x = 100,397.36 × 40,936.44
  4. Step 4: Simplify right side
    72,759.72x = 4,109,910,503.80
  5. Step 5: Solve for x
    x = 4,109,910,503.80/72,759.72
  6. Step 6: Final answer
    x = 56,486.07

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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.