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Finding the Fourth Proportional to 72,908.78, 100,620.09 and 41,079.83

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Solution

The fourth proportional to 72,908.78, 100,620.09 and 41,079.83 is: 56,693.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,908.78 : 100,620.09 = 41,079.83 : x
  2. Step 2: Convert to fraction form
    72,908.78/100,620.09 = 41,079.83/x
  3. Step 3: Cross multiply
    72,908.78x = 100,620.09 × 41,079.83
  4. Step 4: Simplify right side
    72,908.78x = 4,133,455,688.68
  5. Step 5: Solve for x
    x = 4,133,455,688.68/72,908.78
  6. Step 6: Final answer
    x = 56,693.53

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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.