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Finding the Fourth Proportional to 72,129.73, 99,537.56 and 43,844.53

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Solution

The fourth proportional to 72,129.73, 99,537.56 and 43,844.53 is: 60,504.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,129.73 : 99,537.56 = 43,844.53 : x
  2. Step 2: Convert to fraction form
    72,129.73/99,537.56 = 43,844.53/x
  3. Step 3: Cross multiply
    72,129.73x = 99,537.56 × 43,844.53
  4. Step 4: Simplify right side
    72,129.73x = 4,364,177,037.86
  5. Step 5: Solve for x
    x = 4,364,177,037.86/72,129.73
  6. Step 6: Final answer
    x = 60,504.56

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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.