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Finding the Fourth Proportional to 92,757.52, 127,920.89 and 78,447.37

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Solution

The fourth proportional to 92,757.52, 127,920.89 and 78,447.37 is: 108,185.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,757.52 : 127,920.89 = 78,447.37 : x
  2. Step 2: Convert to fraction form
    92,757.52/127,920.89 = 78,447.37/x
  3. Step 3: Cross multiply
    92,757.52x = 127,920.89 × 78,447.37
  4. Step 4: Simplify right side
    92,757.52x = 10,035,057,388.56
  5. Step 5: Solve for x
    x = 10,035,057,388.56/92,757.52
  6. Step 6: Final answer
    x = 108,185.92

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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.