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Finding the Fourth Proportional to 72,961.70, 100,687.14 and 41,130.60

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Solution

The fourth proportional to 72,961.70, 100,687.14 and 41,130.60 is: 56,760.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,961.70 : 100,687.14 = 41,130.60 : x
  2. Step 2: Convert to fraction form
    72,961.70/100,687.14 = 41,130.60/x
  3. Step 3: Cross multiply
    72,961.70x = 100,687.14 × 41,130.60
  4. Step 4: Simplify right side
    72,961.70x = 4,141,322,446.94
  5. Step 5: Solve for x
    x = 4,141,322,446.94/72,961.70
  6. Step 6: Final answer
    x = 56,760.22

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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.