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Finding the Fourth Proportional to 72,791.88, 100,452.08 and 42,571.48

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Solution

The fourth proportional to 72,791.88, 100,452.08 and 42,571.48 is: 58,748.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,791.88 : 100,452.08 = 42,571.48 : x
  2. Step 2: Convert to fraction form
    72,791.88/100,452.08 = 42,571.48/x
  3. Step 3: Cross multiply
    72,791.88x = 100,452.08 × 42,571.48
  4. Step 4: Simplify right side
    72,791.88x = 4,276,392,999.56
  5. Step 5: Solve for x
    x = 4,276,392,999.56/72,791.88
  6. Step 6: Final answer
    x = 58,748.21

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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.