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Finding the Fourth Proportional to 72,960.78, 100,687.41 and 41,129.68

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Solution

The fourth proportional to 72,960.78, 100,687.41 and 41,129.68 is: 56,759.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,960.78 : 100,687.41 = 41,129.68 : x
  2. Step 2: Convert to fraction form
    72,960.78/100,687.41 = 41,129.68/x
  3. Step 3: Cross multiply
    72,960.78x = 100,687.41 × 41,129.68
  4. Step 4: Simplify right side
    72,960.78x = 4,141,240,701.61
  5. Step 5: Solve for x
    x = 4,141,240,701.61/72,960.78
  6. Step 6: Final answer
    x = 56,759.82

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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.