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Finding the Fourth Proportional to 72,451.62, 100,007.82 and 45,639

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Solution

The fourth proportional to 72,451.62, 100,007.82 and 45,639 is: 62,997.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,451.62 : 100,007.82 = 45,639 : x
  2. Step 2: Convert to fraction form
    72,451.62/100,007.82 = 45,639/x
  3. Step 3: Cross multiply
    72,451.62x = 100,007.82 × 45,639
  4. Step 4: Simplify right side
    72,451.62x = 4,564,256,896.98
  5. Step 5: Solve for x
    x = 4,564,256,896.98/72,451.62
  6. Step 6: Final answer
    x = 62,997.31

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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.