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Finding the Fourth Proportional to 66,318.94, 99,481.14 and 19,571.82

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Solution

The fourth proportional to 66,318.94, 99,481.14 and 19,571.82 is: 29,358.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,318.94 : 99,481.14 = 19,571.82 : x
  2. Step 2: Convert to fraction form
    66,318.94/99,481.14 = 19,571.82/x
  3. Step 3: Cross multiply
    66,318.94x = 99,481.14 × 19,571.82
  4. Step 4: Simplify right side
    66,318.94x = 1,947,026,965.47
  5. Step 5: Solve for x
    x = 1,947,026,965.47/66,318.94
  6. Step 6: Final answer
    x = 29,358.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.