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Finding the Fourth Proportional to 72,643.03, 100,202.13 and 49,942.62

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Solution

The fourth proportional to 72,643.03, 100,202.13 and 49,942.62 is: 68,889.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,643.03 : 100,202.13 = 49,942.62 : x
  2. Step 2: Convert to fraction form
    72,643.03/100,202.13 = 49,942.62/x
  3. Step 3: Cross multiply
    72,643.03x = 100,202.13 × 49,942.62
  4. Step 4: Simplify right side
    72,643.03x = 5,004,356,901.78
  5. Step 5: Solve for x
    x = 5,004,356,901.78/72,643.03
  6. Step 6: Final answer
    x = 68,889.71

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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.