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Finding the Fourth Proportional to 71,963.82, 99,467.73 and 63,400.50

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Solution

The fourth proportional to 71,963.82, 99,467.73 and 63,400.50 is: 87,631.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,963.82 : 99,467.73 = 63,400.50 : x
  2. Step 2: Convert to fraction form
    71,963.82/99,467.73 = 63,400.50/x
  3. Step 3: Cross multiply
    71,963.82x = 99,467.73 × 63,400.50
  4. Step 4: Simplify right side
    71,963.82x = 6,306,303,815.87
  5. Step 5: Solve for x
    x = 6,306,303,815.87/71,963.82
  6. Step 6: Final answer
    x = 87,631.59

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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.